APPLETON, Wis. -

A new study indicates Wisconsin lags behind the top-performing states in the number of mental health records it submits to a national database used for background checks on gun purchases.

But The Post-Crescent reported the state has made gains since 2011 in the number of mental health records it submits to the National Instant Criminal Background Check System.

The push to prevent mentally ill people from buying handguns followed the 2007 mass shooting at Virginia Polytechnic Institute.

According to the Wisconsin Department of Justice, Wisconsin had submitted nearly 11,000 mental health records to the National Instant Criminal Background Check System through December 2012.

According to a study by Mayors Against Illegal Guns, Wisconsin only submitted about 6,000 as of Oct. 31, 2011.

The 2011 study determined Wisconsin would have to submit more than three times as many records to be on par with the best-performing states.