From Jezebel:
Sexual assault is infamously one of the most under-reported crimes in America-only 40 percent of victims come forward to police. But in the military, where service-members must often work, socialize and live together, the problem is even more pronounced: The Department of Defense believes that only an anemic 13 percent of victims report assaults. With an estimated 19,000 assaults taking place each year, that's bad, bad news.
Read more here.