OP might be referring to this page:
http://residency.wustl.edu/medadmin...51675e1c167df70186256f8f0073a46c?OpenDocument
This page somewhat confuses me, too. 92% of US senior applicants matched into ophthalmology in 2009? Only 36 US Seniors went unmatched out of 459 spots? Even taking self-selection into account, that percentage seems really high for a specialty that I've heard is difficult to get into...
Especially considering that the SFmatch page shows that the average USMLE step 1 score is around 215 for unmatched applicants, and we all certainly hear of applicants with high (>230) scores not matching, which means that there must be even more applicants with extremely low scores (<200) to balance them out, how does this work out to make ophthalmology such a competitive field?