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Analysis: More than 187,000 students have experienced gun violence at school since Columbine

More than 187,000 students at nearly 200 schools in the U.S. have experienced gun violence at their schools since the Columbine shooting in 1999, according to a Washington Post analysis.

The analysis found that on average, there have been 10 school shootings per year since Columbine. In 2018, there have already been 11 shootings, according to the analysis.

At least 36 states have experienced a shooting at a school, according to the analysis.

The analysis tracked the number of students who have experienced a shooting at their schools during school hours.

The Post did not include in the figures "shootings at after-hours events, accidental discharges that caused no injuries, and suicides that occurred privately or didn't pose a threat to other children." It also did not count gunfire at colleges or universities.

"It's no longer the default that going to school is going to make you feel safe," said Bruce Perry, a psychiatrist and one of the country's leading experts on childhood trauma.

"Even kids who come from middle-class and upper-middle-class communities literally don't feel safe in schools."

Gun control has become a major point of debate since a gunman opened fire at a high school in Parkland, Fla., last month, killing 17 people.

Students across the country in recent weeks have been rallying lawmakers to pass new laws to keep their schools safe.

Last week, students across the country walked out of their classrooms to protest gun violence and call for change.

This weekend, a march is being held in Washington, D.C., and other cities to protest gun violence and demand action on guns.

The Trump administration earlier this month unveiled a series of proposals on school safety and gun restrictions, including a push for states to provide firearms training for school staff members.

Congressional leaders have agreed to strengthen background checks for gun purchases as part of a must-pass government funding package, according to a senior GOP source.