systat -vm does not show useful data on a system with more than 1000 sleeping threads.
On my system it showed "1," for a value of 1180 threads (might also be a problem in humanize numbers, but "1,k" or "1k" are also not very informative).
Widening the field width for "s" from 3 to 4 characters allows to display values of up to 9999.
There is enough free space to the right of these values to allow shifting them one place to the right.
Other fields in this row are unlikely to have values > 999 and thus can stay at a width of 3 characters.