I choose to believe the Washington Post whose reporters have done a stellar job of reporting on something that needs to be exposed. Your numbers are just wrong according to all the reliable sources that have reported on this.Well, let us take a look at what the Government Accountability Office has to say.
In order to determine the geographic distribution of firearms seized in Mexico, we obtained data from CENAPI on seizures, by Mexican federal entity. According to CENAPI data, a total of 29,824 firearms were seized in Mexico in 2008. In order to ascertain the geographic distribution of firearms seized in Mexico that were traced by ATF, we obtained data from ATF linking firearms traced to the Mexican federal entities where they were seized. In fiscal year 2008, ATF traced 7,198 firearms seized in Mexico. Of these, 6,854 were linked to specific states or the Federal District. However, 344 firearms were traced in fiscal year 2008 that could not be linked to a specific state where they may have been seized. We excluded these from our analysis.In 2008 according to CENAPI the Mexican Government seized 29,824 firearms. I don't know about you, but the 90% myth would have you believe that 27,000 of those came from the US. Instead 87% of those submitted for tracing were traced back to the US. If you go to the end of the GAO report you'll find those numbers repeated as well. At the very end of the GAO report you'll find a letter from DHS requesting that the 87% be further explained with hard numbers as 87% alone is misleading.
We ranked the Mexican states and Federal District by the number of firearms seized according to the data provided by CENAPI, and we ranked them a second time according to the trace data provided by ATF. We then compared the two sets of data using a correlation analysis. See figure 9 below. The correlation coefficient for the data was 0.85, indicating a strong positive correlation.
This is for just one year (the latest year that I can readily find hard data, and I mean real numbers, not percentages).
The Washington Post is where Joan Peterson chooses to get her information. I can't change her choice, but I can put the truth out there. And no matter how much they repeat a lie, we can repeat the truth over and over again. And if these numbers don't make "common sense" then Joan Peterson better get into remedial math classes immediately.