This is really good information. I think your assumption that 25% of HS players are seniors may be on the high side. Many large high schools have a Varsity, JV, and a freshman team ( or a JV2). Considering that seniors can only play at the Varsity level, and the entire Varsity isn’t made up of seniors, I would calculate the number of seniors in the program to be more like 20% - maybe even a little less.