Juveniles commit a significant portion of the sex offenses that occur in the United States each year. They account for up to one-fifth of rapes and one-half of all cases of child molestation committed annually. In a 2000 study, data collected by the Bureau of Justice Statistics indicates that 23 percent of sexual assault offenders were under the age of 18. Boys ages 13 to 17 perpetrate most of the sexual crimes committed by juveniles, but recent studies have shown that girls under age 18 and children under age 13 have also committed sexual offenses. Across the country, police officials partnering with other stakeholders have implemented successful programs to manage offenders and prevent future sexual offending by juveniles.