On Dec. 14, 2012, 20-year-old Adam Lanza — armed with his mother’s guns — stormed into Sandy Hook Elementary School in Newtown, Conn., and murdered 20 children and six adult members of staff. As the nation mourned in the wake of that unthinkable tragedy, many citizens and lawmakers raised their voices to demand stricter gun control laws, President Obama vowed to use his power to curb gun violence. “We’re not doing enough,” he said at a December vigil. “And we will have to change.” Tragically, change has been slow in coming.

According to Slate’s gun deaths tally project, at least 9,901 gun-related deaths in the United States have been reported by the media since the Newtown shooting.

This number, says Slate, is a gross underestimate of the actual number of deaths caused by guns in the last 10 months.