No recent data that I can find. The percentile breakdown I got with my July 2006 ITE score suggested that the pass rate that year was (IIRC) 83%. I didn't get a percentile breakdown sheet with my 2007 score.
From http://www.asahq.org/Newsletters/2003/04_03/kapur.html
Anesthesiology was hurting in the mid-90s and programs were taking anyone with a pulse. The 46% pass rate in 2000 surely reflects a lot of marginal candidates and FMGs. These very low pass rates actually support their claim that a pass is based on some minimum knowledge level (at the simplest level, a certain % of questions correct), rather than a predetermined failure rate as some have suggested.
Some more about the history of the exam and how passing scores were determined in the past: http://www.asahq.org/Newsletters/2004/09_04/certif.html
Everyone who took the ITE or the real thing signed a statement agreeing to not remove test materials or memorize them. The Boards for many specialties have been known to hunt down and punish people who violate that agreement. As the rumors go, certain Boards have withheld certification from offenders. Posting them on a public forum is a bad idea.
IIRC Winged Scapula stated that SDN has been lawyer-assaulted (damn their oily hides) for the names of members who post ITE/board questions. Everyone talks about remembered questions to classmates but you're asking for trouble if you commit anything to writing.
this is absolutely true....everyone appreciates your altruism but do not post any exam questions.....