The U.S. Defense Department said on Thursday the estimated number of sexual assaults in the military climbed nearly 38 percent in 2018 compared with a survey two years earlier, data that critics say laid bare broken Pentagon promises of a crackdown.

The Pentagon said there were 6,053 reports of sexual assaults last year, according to an anonymous, bi-annual survey. It is a record number and the highest since the U.S. military began collecting this kind of survey data in 2004.

Taking into consideration unreported cases as well, the military survey estimated 20,500 male and female service members experienced some kind of sexual assault last year. The estimated number in 2016 was 14,900.