Is there a chart or formula for Swann's Improved SCVs?

Managed to work out the figures, with someone mentioning that 10 is the max you can allocate…

# of SCVs for Command Center build time
1    100
2    62.5
3    45.45454545
4    35.71428571
5    29.41176471
6    25
7    21.73913043
8    19.23076923
9    17.24137931
10   15.625   <<< MAX
11   14.28571429
12   13.15789474
13   12.19512195
14   11.36363636
15   10.63829787
16   10
17   9.433962264