Many public universities don’t keep track of the more than 1,000 college student suicides that occur every year.

The Associated Press asked the 100 largest U.S. public universities for annual suicide statistics and found that 46 currently track suicides, including 27 that have consistently done so since 2007. Of the 54 remaining schools, 43 said they don’t track suicides, nine could provide only limited data and didn’t answer questions about how consistently they tracked suicides, and two didn’t provide statistics.

“The U.S. Education Department asks colleges to collect data on student deaths but not suicides specifically, and a variety of factors can discourage schools from tracking it,” AP said. “Often it’s difficult to confirm the cause of death, and medical examiners don’t always notify universities when a cause is determined. There are concerns about legal liability. Some families prefer to keep it private. Even schools that collect data differ on whether they count suicides that occur away from campus or during breaks. And if the statistics become public, some schools fear it could damage their reputations.”