I think you could up the $10+1 number to 40%.
Also, I don't know about most people, but I actually have a *higher* ROI in my history at the 50s than at the 30s. Remember that the number of chips starting increases. I would put the 50s number at 25%
My 3-tabling 100s numbers are at least as high as schuster reported, although I don't have them in front of me. I think they were about 35% over many hundreds of SNGs. However, if you're gonna make the 30s and 50s at 25%, I think that 20% is appropriate for the 100s (people should be improving in skill as they move up the charts).
At the 200s, 19% is very impressive. I had a drop from 35% or whatever to about 10%. Still working on that.