When we have numbers!

http://www.foxnews.com/politics/elec...umber-claimed/

The fact is, only 17 percent of guns found at Mexican crime scenes have been traced to the U.S.

What's true, an ATF spokeswoman told FOXNews.com, in a clarification of the statistic used by her own agency's assistant director, "is that over 90 percent of the traced firearms originate from the U.S."
Not that this will change anything, we'll be stuck with the 90% number for years now that it has gotten out.