Sex crimes on the city’s subways jumped 28 percent so far this year compared to the same period in 2015, police said Monday.

There have been 913 sex crimes on trains and platforms to date in 2016, compared to 713 last year, NYPD Transit Division Assistant Chief Vincent Coogan said at an MTA meeting.

Coogan suggested that the actual frequency of sex crimes hasn’t risen that much, but people are simply reporting and documenting them more thanks to social media and rider education.

Most of the crimes include actions such as forcible touching and indecent exposure.

Coogan said arrests were made in slightly more than 50 percent of reported cases.