Indiana has the second highest rate of teen rape in the nation. The ranking concerns high school girls in grades nine through 12. The Centers of Disease Control and Prevention in Atlanta says 10.5 percent of all high school-age girls in th enation have been sexually assaulted. However, in Indiana, the numbers are much higher than nearly anywhere else in the country. 17.3 percent of girls in grades nine through 12 in the state have reported experiencing rape or sexual assault.