I suspect that both PA and OH do quite well with the shear number of players when you include more than just a few elite D1 conferences. The number of D3, D2, branch campus, community colleges and NAIA, schools along with the 'other' D1 schools provide our dd's many more opportunities than the western, mid-western and southern states could dream of.
For the I(c)SST ( a regional tournament) we maintain contact with over 120 college coaches within 2-3 hours driving time of Indiana PA. Those colleges have over 2,000 collegiate softball players of which some 500 have to be replaced each and every year. When you do a similar study of rosters of 'local' colleges in all but the elite schools you will find the vast majority of those players are from PA and OH year in and year out.
Its great when one of our dd's gets to play for an elite program but don't discount the importance when 2,000 of them get to play close enough to home that you can go to the games.
BTW: PA has 192 Colleges and Universities with more than 750,000 students some of which play softball.