Tuesday’s school shooting in Oregon is at least the 74th instance of shots being fired on school grounds or in school buildings since the late-2012 elementary school shooting in Newtown, Conn., according to a list maintained by the group Everytown for Gun Safety, which advocates for policies it believes limit gun violence.

There have been at least 37 shootings on school grounds this year, which is just barely half over. All told, there has been nearly one shooting per week in the year and a half since Newtown. Everytown identifies a school shooting as any instance in which a firearm was discharged within a school building or on school grounds, sourced to multiple news reports per incident. Therefore, the data isn’t limited to mass shootings like Newtown—it includes assaults, homicides, suicides and even accidental shootings. Of the shootings, 35 took place at a college or university, while 39 took place in K-12 schools.

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Georgia, which passed an expansive pro-gun law this year, has been site of the most incidents on Everytown’s list, with 10 shootings reported. Florida was next, with seven. Tennessee claimed five, and North Carolina and California was home to four each. Atlanta was the only city that had three such shootings. Six other cities had two shootings. All told, 31 states are represented on the list of shootings in schools or on school campuses or grounds.

A February analysis by the group of a list of school shootings since Newtown (which was later expanded) found that nearly half resulted in at least one death. Three in four shooters obtained guns at home, at least in instances in which the firearm’s source could be determined.