Go to Wash U's specialty site:
I used this site as a medical student for getting some stats on specialties, in particular ortho. They extrapolate their data from the NRMP.
According to them:
2007 2006 2005 2004
Categorical positions available for U.S. Seniors 616 615 610 589
% U.S. Seniors matched* 82 84 78 *79
# Unfilled Categorical/ Advanced Positions 2 6 5 1
#Unmatched U.S. seniors 126 101 148 148
If you believe this, then the numbers aren't that bad for getting into ortho, and certainly gave me a little relief unlike this ultra intimidating forum. I'm not sure where the numbers came from for the previous posts. If you add matched and unmatched together you get 742 applicants for 2007. Perhaps, there are a ton of applicants that throw ortho into their ranklist, and end up matching into something else. If you count the numbers of applicants that listed at least one ortho program on their ranklist and then matched into something else, certainly this would increase the overall number of applicants, but not get counted as unmatched, and this may account for the discrepency.
The previous years 2001, 2002, and 2003 were also all between 75-85% match rate. These numbers are more in line with what I personally saw in my match, and with the fact that most schools end up matching between 50 and 100% of the ortho applicants (coindidence the average of 50 and 100 is 75%? I think not!)
In any case, don't sweat the numbers, the bottom line ortho is competative- do well in school/tests, try to impress on interviews, and then just cross your fingers.