Some findings from 2005-2013

The Marines were far more likely than other branches to send offenders to prison, with 53 prison sentences out of 270 cases. By contrast, of the Navy's 203 cases, more than 70 were court-martialed or punished in some way. Only 15 were sentenced to time behind bars.

The Air Force was the most lenient. Of 124 sex crimes, the only punishment for 21 offenders was a letter of reprimand.

Victims increasingly declined to cooperate with investigators or recanted, a sign they may have been losing confidence in the system. In 2006, the Naval Criminal Investigative Service, which handles the Navy and Marine Corps, reported 13 such cases; in 2012, it was 28.

Of 244 service members whose punishments were detailed in the records, only a third of them were incarcerated.

Associated Press