Link to stats 2005-2010:
http://www.odos.uiuc.edu/greek/membe...lenicStats.asp
I am going to guess, based on number of girls released from all chapters during recruitment, that RFM was implemented in 2008, when the total number released went down drastically.
I'm also going to guess that the number of girls not receiving any bids after the third invitational were ISPs.
It looks like if the PNM keeps an open mind and doesn't favor early on, she will find the chapter that loves her enough to want her to be part of their sisterhood. Which I think bodes well for all the PNMs going through recruitment.