Index: documentation/.gitignore
===================================================================
--- documentation/.gitignore
+++ documentation/.gitignore
@@ -1,4 +1,5 @@
 # Hugo default output directory
+/.asciidoctor
 /public
 resources
 
Index: documentation/config/_default/config.toml
===================================================================
--- documentation/config/_default/config.toml
+++ documentation/config/_default/config.toml
@@ -32,7 +32,7 @@
     urls = [".*"]
 
 [markup.asciidocExt]
-    extensions = ["man-macro", "inter-document-references-macro", "cross-document-references-macro", "sectnumoffset-treeprocessor", "packages-macro", "git-macro"]
+    extensions = ["man-macro", "inter-document-references-macro", "cross-document-references-macro", "sectnumoffset-treeprocessor", "packages-macro", "git-macro", "asciidoctor-diagram"]
     [markup.asciidocExt.attributes]
       env-beastie = true
       isOnline = true
Index: documentation/content/en/books/dev-model/_index.adoc
===================================================================
--- documentation/content/en/books/dev-model/_index.adoc
+++ documentation/content/en/books/dev-model/_index.adoc
@@ -46,6 +46,7 @@
 :source-highlighter: rouge
 :experimental:
 :images-path: books/dev-model/
+:imagesoutdir: public/images/books/dev-model
 
 ifdef::env-beastie[]
 ifdef::backend-html5[]
@@ -1068,7 +1069,53 @@
 The amount of ports has grown at a tremendous rate, as shown by the following figure.
 
 .Number of ports added between 1995 and 2022 [[fig-ports]]
-image::portsstatus.svg
+
+[gnuplot, target=portsstatus, format=svg]
+....
+$portsstatus <<EOD
+1995, 192
+1996, 485
+1997, 917
+1998, 1608
+1999, 2546
+2000, 3746
+2001, 5446
+2002, 7787
+2003, 9275
+2004, 11492
+2005, 13534
+2006, 15225
+2007, 17411
+2008, 18864
+2009, 20390
+2010, 21619
+2011, 22932
+2012, 23290
+2013, 24153
+2014, 24643
+2015, 24524
+2016, 25670
+2017, 26709
+2018, 27866
+2019, 28649
+2020, 28827
+2021, 28951
+2022, 30148
+EOD
+set title 'Number of ports over the year'
+set ylabel 'Ports Count'
+set xlabel 'Year'
+set xdata time
+set timefmt '%Y'
+set format x '%Y'
+set datafile sep ','
+set key top left autotitle columnheader
+set grid
+set autoscale
+set terminal svg
+set nokey
+plot $portsstatus using 1:2 lt rgb 'red' w l
+....
 
 <<fig-ports>> shows the number of ports available to FreeBSD in the period 1995 to 2022.
 It looks like the curve has first grown exponentially, and then from the middle of 2001 to the middle of 2007 grown linearly at a rate of about 2000 ports/year, before its growth rate gets lower.
Index: documentation/static/images/books/dev-model/portsstatus.svg
===================================================================
--- documentation/static/images/books/dev-model/portsstatus.svg
+++ /dev/null
@@ -1,341 +0,0 @@
-<?xml version="1.0" encoding="utf-8"  standalone="no"?>
-<svg 
- width="600" height="480"
- viewBox="0 0 600 480"
- xmlns="http://www.w3.org/2000/svg"
- xmlns:xlink="http://www.w3.org/1999/xlink"
->
-
-<title>Gnuplot</title>
-<desc>Produced by GNUPLOT 5.4 patchlevel 1 </desc>
-
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-
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-	<use xlink:href='#gpPt5' id='gpPt6' fill='currentColor' stroke='none'/>
-	<path id='gpPt7' stroke-width='0.222' stroke='currentColor' d='M0,-1.33 L-1.33,0.67 L1.33,0.67 z'/>
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-<g fill="none" color="gray" stroke="currentColor" stroke-width="0.50" stroke-linecap="butt" stroke-linejoin="miter">
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-<g fill="none" color="black" stroke="currentColor" stroke-width="1.00" stroke-linecap="butt" stroke-linejoin="miter">
-	<path stroke='black'  d='M89.31,264.52 L98.31,264.52 M574.82,264.52 L565.82,264.52  '/>	<g transform="translate(80.92,268.42)" stroke="none" fill="black" font-family="Arial" font-size="12.00"  text-anchor="end">
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-<g fill="none" color="gray" stroke="currentColor" stroke-width="0.50" stroke-linecap="butt" stroke-linejoin="miter">
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-<g fill="none" color="black" stroke="currentColor" stroke-width="1.00" stroke-linecap="butt" stroke-linejoin="miter">
-	<path stroke='black'  d='M89.31,211.89 L98.31,211.89 M574.82,211.89 L565.82,211.89  '/>	<g transform="translate(80.92,215.79)" stroke="none" fill="black" font-family="Arial" font-size="12.00"  text-anchor="end">
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-</g>
-<g fill="none" color="gray" stroke="currentColor" stroke-width="0.50" stroke-linecap="butt" stroke-linejoin="miter">
-	<path stroke='gray' stroke-dasharray='2,4' class="gridline"  d='M89.31,159.26 L574.82,159.26  '/></g>
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-</g>
-<g fill="none" color="black" stroke="currentColor" stroke-width="1.00" stroke-linecap="butt" stroke-linejoin="miter">
-	<path stroke='black'  d='M89.31,159.26 L98.31,159.26 M574.82,159.26 L565.82,159.26  '/>	<g transform="translate(80.92,163.16)" stroke="none" fill="black" font-family="Arial" font-size="12.00"  text-anchor="end">
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-</g>
-<g fill="none" color="gray" stroke="currentColor" stroke-width="0.50" stroke-linecap="butt" stroke-linejoin="miter">
-	<path stroke='gray' stroke-dasharray='2,4' class="gridline"  d='M89.31,106.64 L574.82,106.64  '/></g>
-<g fill="none" color="gray" stroke="gray" stroke-width="1.00" stroke-linecap="butt" stroke-linejoin="miter">
-</g>
-<g fill="none" color="black" stroke="currentColor" stroke-width="1.00" stroke-linecap="butt" stroke-linejoin="miter">
-	<path stroke='black'  d='M89.31,106.64 L98.31,106.64 M574.82,106.64 L565.82,106.64  '/>	<g transform="translate(80.92,110.54)" stroke="none" fill="black" font-family="Arial" font-size="12.00"  text-anchor="end">
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-</g>
-<g fill="none" color="gray" stroke="currentColor" stroke-width="0.50" stroke-linecap="butt" stroke-linejoin="miter">
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-<g fill="none" color="gray" stroke="gray" stroke-width="1.00" stroke-linecap="butt" stroke-linejoin="miter">
-</g>
-<g fill="none" color="black" stroke="currentColor" stroke-width="1.00" stroke-linecap="butt" stroke-linejoin="miter">
-	<path stroke='black'  d='M89.31,54.01 L98.31,54.01 M574.82,54.01 L565.82,54.01  '/>	<g transform="translate(80.92,57.91)" stroke="none" fill="black" font-family="Arial" font-size="12.00"  text-anchor="end">
-		<text><tspan font-family="Arial" > 35000</tspan></text>
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-</g>
-<g fill="none" color="black" stroke="currentColor" stroke-width="1.00" stroke-linecap="butt" stroke-linejoin="miter">
-</g>
-<g fill="none" color="black" stroke="black" stroke-width="0.50" stroke-linecap="butt" stroke-linejoin="miter">
-</g>
-<g fill="none" color="gray" stroke="currentColor" stroke-width="0.50" stroke-linecap="butt" stroke-linejoin="miter">
-	<path stroke='gray' stroke-dasharray='2,4' class="gridline"  d='M89.31,422.40 L89.31,54.01  '/></g>
-<g fill="none" color="gray" stroke="gray" stroke-width="1.00" stroke-linecap="butt" stroke-linejoin="miter">
-</g>
-<g fill="none" color="black" stroke="currentColor" stroke-width="1.00" stroke-linecap="butt" stroke-linejoin="miter">
-	<path stroke='black'  d='M89.31,422.40 L89.31,413.40 M89.31,54.01 L89.31,63.01  '/>	<g transform="translate(89.31,444.30)" stroke="none" fill="black" font-family="Arial" font-size="12.00"  text-anchor="middle">
-		<text><tspan font-family="Arial" >1994</tspan></text>
-	</g>
-</g>
-<g fill="none" color="black" stroke="currentColor" stroke-width="1.00" stroke-linecap="butt" stroke-linejoin="miter">
-	<path stroke='black'  d='M105.49,422.40 L105.49,417.90 M105.49,54.01 L105.49,58.51 M121.68,422.40 L121.68,417.90 M121.68,54.01 L121.68,58.51
-		 '/></g>
-<g fill="none" color="black" stroke="black" stroke-width="0.50" stroke-linecap="butt" stroke-linejoin="miter">
-</g>
-<g fill="none" color="gray" stroke="currentColor" stroke-width="0.50" stroke-linecap="butt" stroke-linejoin="miter">
-	<path stroke='gray' stroke-dasharray='2,4' class="gridline"  d='M137.91,422.40 L137.91,54.01  '/></g>
-<g fill="none" color="gray" stroke="gray" stroke-width="1.00" stroke-linecap="butt" stroke-linejoin="miter">
-</g>
-<g fill="none" color="black" stroke="currentColor" stroke-width="1.00" stroke-linecap="butt" stroke-linejoin="miter">
-	<path stroke='black'  d='M137.91,422.40 L137.91,413.40 M137.91,54.01 L137.91,63.01  '/>	<g transform="translate(137.91,444.30)" stroke="none" fill="black" font-family="Arial" font-size="12.00"  text-anchor="middle">
-		<text><tspan font-family="Arial" >1997</tspan></text>
-	</g>
-</g>
-<g fill="none" color="black" stroke="currentColor" stroke-width="1.00" stroke-linecap="butt" stroke-linejoin="miter">
-	<path stroke='black'  d='M154.04,422.40 L154.04,417.90 M154.04,54.01 L154.04,58.51 M170.23,422.40 L170.23,417.90 M170.23,54.01 L170.23,58.51
-		 '/></g>
-<g fill="none" color="black" stroke="black" stroke-width="0.50" stroke-linecap="butt" stroke-linejoin="miter">
-</g>
-<g fill="none" color="gray" stroke="currentColor" stroke-width="0.50" stroke-linecap="butt" stroke-linejoin="miter">
-	<path stroke='gray' stroke-dasharray='2,4' class="gridline"  d='M186.41,422.40 L186.41,54.01  '/></g>
-<g fill="none" color="gray" stroke="gray" stroke-width="1.00" stroke-linecap="butt" stroke-linejoin="miter">
-</g>
-<g fill="none" color="black" stroke="currentColor" stroke-width="1.00" stroke-linecap="butt" stroke-linejoin="miter">
-	<path stroke='black'  d='M186.41,422.40 L186.41,413.40 M186.41,54.01 L186.41,63.01  '/>	<g transform="translate(186.41,444.30)" stroke="none" fill="black" font-family="Arial" font-size="12.00"  text-anchor="middle">
-		<text><tspan font-family="Arial" >2000</tspan></text>
-	</g>
-</g>
-<g fill="none" color="black" stroke="currentColor" stroke-width="1.00" stroke-linecap="butt" stroke-linejoin="miter">
-	<path stroke='black'  d='M202.64,422.40 L202.64,417.90 M202.64,54.01 L202.64,58.51 M218.78,422.40 L218.78,417.90 M218.78,54.01 L218.78,58.51
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-<g fill="none" color="black" stroke="black" stroke-width="0.50" stroke-linecap="butt" stroke-linejoin="miter">
-</g>
-<g fill="none" color="gray" stroke="currentColor" stroke-width="0.50" stroke-linecap="butt" stroke-linejoin="miter">
-	<path stroke='gray' stroke-dasharray='2,4' class="gridline"  d='M234.96,422.40 L234.96,54.01  '/></g>
-<g fill="none" color="gray" stroke="gray" stroke-width="1.00" stroke-linecap="butt" stroke-linejoin="miter">
-</g>
-<g fill="none" color="black" stroke="currentColor" stroke-width="1.00" stroke-linecap="butt" stroke-linejoin="miter">
-	<path stroke='black'  d='M234.96,422.40 L234.96,413.40 M234.96,54.01 L234.96,63.01  '/>	<g transform="translate(234.96,444.30)" stroke="none" fill="black" font-family="Arial" font-size="12.00"  text-anchor="middle">
-		<text><tspan font-family="Arial" >2003</tspan></text>
-	</g>
-</g>
-<g fill="none" color="black" stroke="currentColor" stroke-width="1.00" stroke-linecap="butt" stroke-linejoin="miter">
-	<path stroke='black'  d='M251.15,422.40 L251.15,417.90 M251.15,54.01 L251.15,58.51 M267.37,422.40 L267.37,417.90 M267.37,54.01 L267.37,58.51
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-</g>
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-	<path stroke='black'  d='M283.51,422.40 L283.51,413.40 M283.51,54.01 L283.51,63.01  '/>	<g transform="translate(283.51,444.30)" stroke="none" fill="black" font-family="Arial" font-size="12.00"  text-anchor="middle">
-		<text><tspan font-family="Arial" >2006</tspan></text>
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-	<path stroke='black'  d='M299.70,422.40 L299.70,417.90 M299.70,54.01 L299.70,58.51 M315.88,422.40 L315.88,417.90 M315.88,54.01 L315.88,58.51
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-		<text><tspan font-family="Arial" >2009</tspan></text>
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-</g>
-<g fill="none" color="black" stroke="currentColor" stroke-width="1.00" stroke-linecap="butt" stroke-linejoin="miter">
-	<path stroke='black'  d='M348.25,422.40 L348.25,417.90 M348.25,54.01 L348.25,58.51 M364.43,422.40 L364.43,417.90 M364.43,54.01 L364.43,58.51
-		 '/></g>
-<g fill="none" color="black" stroke="black" stroke-width="0.50" stroke-linecap="butt" stroke-linejoin="miter">
-</g>
-<g fill="none" color="gray" stroke="currentColor" stroke-width="0.50" stroke-linecap="butt" stroke-linejoin="miter">
-	<path stroke='gray' stroke-dasharray='2,4' class="gridline"  d='M380.62,422.40 L380.62,54.01  '/></g>
-<g fill="none" color="gray" stroke="gray" stroke-width="1.00" stroke-linecap="butt" stroke-linejoin="miter">
-</g>
-<g fill="none" color="black" stroke="currentColor" stroke-width="1.00" stroke-linecap="butt" stroke-linejoin="miter">
-	<path stroke='black'  d='M380.62,422.40 L380.62,413.40 M380.62,54.01 L380.62,63.01  '/>	<g transform="translate(380.62,444.30)" stroke="none" fill="black" font-family="Arial" font-size="12.00"  text-anchor="middle">
-		<text><tspan font-family="Arial" >2012</tspan></text>
-	</g>
-</g>
-<g fill="none" color="black" stroke="currentColor" stroke-width="1.00" stroke-linecap="butt" stroke-linejoin="miter">
-	<path stroke='black'  d='M396.84,422.40 L396.84,417.90 M396.84,54.01 L396.84,58.51 M412.98,422.40 L412.98,417.90 M412.98,54.01 L412.98,58.51
-		 '/></g>
-<g fill="none" color="black" stroke="black" stroke-width="0.50" stroke-linecap="butt" stroke-linejoin="miter">
-</g>
-<g fill="none" color="gray" stroke="currentColor" stroke-width="0.50" stroke-linecap="butt" stroke-linejoin="miter">
-	<path stroke='gray' stroke-dasharray='2,4' class="gridline"  d='M429.17,422.40 L429.17,54.01  '/></g>
-<g fill="none" color="gray" stroke="gray" stroke-width="1.00" stroke-linecap="butt" stroke-linejoin="miter">
-</g>
-<g fill="none" color="black" stroke="currentColor" stroke-width="1.00" stroke-linecap="butt" stroke-linejoin="miter">
-	<path stroke='black'  d='M429.17,422.40 L429.17,413.40 M429.17,54.01 L429.17,63.01  '/>	<g transform="translate(429.17,444.30)" stroke="none" fill="black" font-family="Arial" font-size="12.00"  text-anchor="middle">
-		<text><tspan font-family="Arial" >2015</tspan></text>
-	</g>
-</g>
-<g fill="none" color="black" stroke="currentColor" stroke-width="1.00" stroke-linecap="butt" stroke-linejoin="miter">
-	<path stroke='black'  d='M445.35,422.40 L445.35,417.90 M445.35,54.01 L445.35,58.51 M461.58,422.40 L461.58,417.90 M461.58,54.01 L461.58,58.51
-		 '/></g>
-<g fill="none" color="black" stroke="black" stroke-width="0.50" stroke-linecap="butt" stroke-linejoin="miter">
-</g>
-<g fill="none" color="gray" stroke="currentColor" stroke-width="0.50" stroke-linecap="butt" stroke-linejoin="miter">
-	<path stroke='gray' stroke-dasharray='2,4' class="gridline"  d='M477.72,422.40 L477.72,54.01  '/></g>
-<g fill="none" color="gray" stroke="gray" stroke-width="1.00" stroke-linecap="butt" stroke-linejoin="miter">
-</g>
-<g fill="none" color="black" stroke="currentColor" stroke-width="1.00" stroke-linecap="butt" stroke-linejoin="miter">
-	<path stroke='black'  d='M477.72,422.40 L477.72,413.40 M477.72,54.01 L477.72,63.01  '/>	<g transform="translate(477.72,444.30)" stroke="none" fill="black" font-family="Arial" font-size="12.00"  text-anchor="middle">
-		<text><tspan font-family="Arial" >2018</tspan></text>
-	</g>
-</g>
-<g fill="none" color="black" stroke="currentColor" stroke-width="1.00" stroke-linecap="butt" stroke-linejoin="miter">
-	<path stroke='black'  d='M493.90,422.40 L493.90,417.90 M493.90,54.01 L493.90,58.51 M510.09,422.40 L510.09,417.90 M510.09,54.01 L510.09,58.51
-		 '/></g>
-<g fill="none" color="black" stroke="black" stroke-width="0.50" stroke-linecap="butt" stroke-linejoin="miter">
-</g>
-<g fill="none" color="gray" stroke="currentColor" stroke-width="0.50" stroke-linecap="butt" stroke-linejoin="miter">
-	<path stroke='gray' stroke-dasharray='2,4' class="gridline"  d='M526.31,422.40 L526.31,54.01  '/></g>
-<g fill="none" color="gray" stroke="gray" stroke-width="1.00" stroke-linecap="butt" stroke-linejoin="miter">
-</g>
-<g fill="none" color="black" stroke="currentColor" stroke-width="1.00" stroke-linecap="butt" stroke-linejoin="miter">
-	<path stroke='black'  d='M526.31,422.40 L526.31,413.40 M526.31,54.01 L526.31,63.01  '/>	<g transform="translate(526.31,444.30)" stroke="none" fill="black" font-family="Arial" font-size="12.00"  text-anchor="middle">
-		<text><tspan font-family="Arial" >2021</tspan></text>
-	</g>
-</g>
-<g fill="none" color="black" stroke="currentColor" stroke-width="1.00" stroke-linecap="butt" stroke-linejoin="miter">
-	<path stroke='black'  d='M542.45,422.40 L542.45,417.90 M542.45,54.01 L542.45,58.51 M558.64,422.40 L558.64,417.90 M558.64,54.01 L558.64,58.51
-		 '/></g>
-<g fill="none" color="black" stroke="black" stroke-width="0.50" stroke-linecap="butt" stroke-linejoin="miter">
-</g>
-<g fill="none" color="gray" stroke="currentColor" stroke-width="0.50" stroke-linecap="butt" stroke-linejoin="miter">
-	<path stroke='gray' stroke-dasharray='2,4' class="gridline"  d='M574.82,422.40 L574.82,54.01  '/></g>
-<g fill="none" color="gray" stroke="gray" stroke-width="1.00" stroke-linecap="butt" stroke-linejoin="miter">
-</g>
-<g fill="none" color="black" stroke="currentColor" stroke-width="1.00" stroke-linecap="butt" stroke-linejoin="miter">
-	<path stroke='black'  d='M574.82,422.40 L574.82,413.40 M574.82,54.01 L574.82,63.01  '/>	<g transform="translate(574.82,444.30)" stroke="none" fill="black" font-family="Arial" font-size="12.00"  text-anchor="middle">
-		<text><tspan font-family="Arial" >2024</tspan></text>
-	</g>
-</g>
-<g fill="none" color="black" stroke="currentColor" stroke-width="1.00" stroke-linecap="butt" stroke-linejoin="miter">
-</g>
-<g fill="none" color="black" stroke="currentColor" stroke-width="1.00" stroke-linecap="butt" stroke-linejoin="miter">
-	<path stroke='black'  d='M89.31,54.01 L89.31,422.40 L574.82,422.40 L574.82,54.01 L89.31,54.01 Z  '/></g>
-<g fill="none" color="black" stroke="currentColor" stroke-width="1.00" stroke-linecap="butt" stroke-linejoin="miter">
-	<g transform="translate(19.18,238.21) rotate(270)" stroke="none" fill="black" font-family="Arial" font-size="12.00"  text-anchor="middle">
-		<text><tspan font-family="Arial" >Ports Count</tspan></text>
-	</g>
-</g>
-<g fill="none" color="black" stroke="currentColor" stroke-width="1.00" stroke-linecap="butt" stroke-linejoin="miter">
-	<g transform="translate(332.06,471.30)" stroke="none" fill="black" font-family="Arial" font-size="12.00"  text-anchor="middle">
-		<text><tspan font-family="Arial" >Year</tspan></text>
-	</g>
-</g>
-<g fill="none" color="black" stroke="currentColor" stroke-width="1.00" stroke-linecap="butt" stroke-linejoin="miter">
-</g>
-	<g id="gnuplot_plot_1" ><title>192</title>
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-	<path stroke='rgb(255,   0,   0)'  d='M121.66,417.30 L137.87,412.75 L154.04,405.48 L170.22,395.60 L186.39,382.97 L202.61,365.08 L218.78,340.44 L234.95,324.78
-		L251.12,301.44 L267.34,279.95 L283.51,262.15 L299.69,239.14 L315.86,223.85 L332.08,207.79 L348.25,194.85 L364.42,181.03
-		L380.59,177.26 L396.81,168.18 L412.98,163.02 L429.16,164.27 L445.33,152.21 L461.55,141.28 L477.72,129.10 L493.89,120.86
-		L510.06,118.98 L526.28,117.68 L542.45,105.08  '/></g>
-	</g>
-<g fill="none" color="white" stroke="rgb(255,   0,   0)" stroke-width="2.00" stroke-linecap="butt" stroke-linejoin="miter">
-</g>
-<g fill="none" color="black" stroke="currentColor" stroke-width="2.00" stroke-linecap="butt" stroke-linejoin="miter">
-</g>
-<g fill="none" color="black" stroke="black" stroke-width="1.00" stroke-linecap="butt" stroke-linejoin="miter">
-</g>
-<g fill="none" color="black" stroke="currentColor" stroke-width="1.00" stroke-linecap="butt" stroke-linejoin="miter">
-	<path stroke='black'  d='M89.31,54.01 L89.31,422.40 L574.82,422.40 L574.82,54.01 L89.31,54.01 Z  '/></g>
-<g fill="none" color="black" stroke="currentColor" stroke-width="1.00" stroke-linecap="butt" stroke-linejoin="miter">
-	<g transform="translate(332.06,30.91)" stroke="none" fill="black" font-family="Arial" font-size="12.00"  text-anchor="middle">
-		<text><tspan font-family="Arial" >Number of ports over the year</tspan></text>
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-</g>
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-</svg>
-