As details surrounding the San Bernardino, California, shooting gradually emerged Wednesday evening, President Barack Obama told CBS News that the U.S. has “a pattern now of mass shooting in this country that has no parallel anywhere else in the world.”

The mass shooting at a social services agency in San Bernardino left at least 14 dead and 17 others wounded. It is also the deadliest mass shooting in the U.S. since Adam Lanza opened fire at Sandy Hook Elementary in Newtown, Connecticut, on Dec. 15, 2012, killing 26 children and adults.

Using data from shootingtracker.com, which is maintained by a Reddit group, we’ve updated our map that documents all the U.S. mass shootings in 2015 alone. The group defines mass shootings as incidents when at least four people are killed or wounded, including the gunman.

According to the tracker’s data, the San Bernardino incident represents the 355th shooting this year, the Washington Post reported. The incident in San Bernardino also overshadowed another shooting in Savannah, Georgia that occurred the same day, claiming one life and injuring three others.

However, there’s not a standard definition of “mass shooting.” Adam Lankford, a criminal justice professor at the University of Alabama previously told the NewsHour that FBI’s data included incidents where fewer than four people were shot and didn’t include shootings of multiple people that occur in a home or other uncrowded setting.

On Friday, a gunmen surrendered to police after an hourslong siege in Colorado Springs, Colorado, where he killed three people and wounded nine others in a Planned Parenthood clinic. The same day, a gunfight killed two and injured two in Sacramento, California. On Nov. 23, there were mass shootings in Houston, Minneapolis and Columbus, Ohio. There were five shootings on Nov. 22.

On Oct. 1, when a gunman killed 10 people and wounded seven more at a community college in Roseburg, Oregon, Obama also spoke of the routine nature of these shootings.

“[A]s I said just a few months ago, and I said a few months before that, and I said each time we see one of these mass shootings, our thoughts and prayers are not enough. It’s not enough,” Obama said.