When I was looking at starting the course (2000) I heard 45%, which fits with Alex's comment. However it varies by school, and of course somewhat over time by random fluctuation and due to changes at the school - variation I have heard of is from around 25% to over 80% (obviously I can neither libel nor advertise schools here, especially as some of the data is only estimated by students from straw polls of their colleagues).
<edited due to changes to make sense!>
Last edited by Send Clowns; 28th Nov 2003 at 17:41.