I asked about the official numbers and here is what I got:
(year - entering class size - number of students who completed PhD)
1995 - 24 - 17
1996 - 21 - 13
1997 - 22 - 13
1998 - 24 - 16
1999 - 24 - 17
2000 - 26 - 17
2001 - 17 - 11
2002 - 25 - 14
2003 - 21 - 14
2004 - 20 - 16
2005 - 29 - 12 (there are still 5 students in the Program, besides those 12 who already graduated)
2006 - 27 - 7 (there are still 10 students in the Program, besides those 7 who already graduated)
Note that these stats consider the students who finish the Program, not only the first year.
Now, for 2007 and after I guess these numbers will be more useful:
(year - entering class size - still in program)
2007 - 24 - 16
2008 - 31 - 21
2009 - 24 - 19
I was there in the flyout too and it was really nice! The Program seems great! I guess LAecon has already covered the main topics.
One thing that made me kind of worried was that some students really scared me about the prelims, using expressions like "hell" or "the worst thing in my life"... but I guess this was expected.
They also mentioned that this is so because they really pressure themselves to pass in the first try, which less than half of the class did last year...
Hope this helps!