In a 2009 survey, the CDC found that 9.8% of high school students in the U.S. reported having been intentionally physically hurt by their boyfriend or girlfriend in the preceding 12 months. A 2011 CDC nationwide survey of the U.S. population reported that 23% of females and 14% of males who ever experienced rape, other physical violence, or stalking by an intimate partner first experienced some form of partner violence between 11 and 17 years of age. The ages between 16 and 24 are when youth are the most susceptible to dating violence. Also, according to the CDC, one in ten teens will be physically abused between seventh and twelfth grade. Because of this abuse, victims are more likely to abuse drugs and alcohol, employ precarious sexual conduct, develop eating disorders, and attempt suicide. Males learning violent behaviors coupled with females thinking it normative creates a cycle of women being abused, learning to accept it and imparting this idea to their children and repeating the process. According to a study conducted by Susan M. Sanders, many adolescents do not always view aggressive behavior as violent or abusive and roughly 77.6% young girls agreed that after a physical altercation such as being kicked by their partner that they would cease to date them. The study conducted demonstrated that many adolescents, primarily females, were more susceptible to leave only after a physical altercation took place. With these studies it was found that once a physical altercation took place the victim would then view it as abusive and eventually desire to leave the relationship.