Latest NICS data

Source available here.  Note that between 2008 and 2011, while NICS checks rose 29.4 percent, violent crime rates have dropped significantly.

Violent Crime 457.5 to 387.5 per 100,000 people, a 15% drop

Murder 5.4 to 4.7 per 100,000 people, a 13% drop

Rape 29.7 to 26.4 per 100,000 people, an 11% drop

Robbery 145.7 to 114.3 per 100,000 people, a 22% drop

Aggravated Assault 276.7 to 242.2 per 100,000 people, a 14% drop

Some data on how NICS checks have changed over time before and after Obama became president.

Data available here.