[Jgerald]

Concealed handgun permit holders have monthly NICS checks ran on them in Kentucky. Hence, the numbers for Kentucky are overinflated.

The numbers for other states are under-reported as there are alternatives to NCIS.

http://www.fbi.gov/about-us/cjis/nics/general-information/nics-participation-map-as-of-april-2011

[Tupelo]

"Concealed handgun permit holders have monthly NICS checks ran on them in Kentucky." That explains the Kentucky numbers. The real shocker though was Illinois and Californicate.
I wonder if their numbers are skewed in a similar manner as Kentucky's