– The National Incidence Study of Child Abuse and Neglect, a sample survey of professionals who work with children conducted by the federal government once a decade, documented a 47 percent decline in sexual abuse between 1993 and 2005.
– FBI statistics based on local law enforcement crime reports show a 35 percent drop between 1992 and 2010. The FBI does not break down rape by age of victim, but over 50 percent of victims of reported rapes are under 18, so a drop in FBI rape statistics is considered a good indicator of a drop in sex crimes against minors.
– The National Crime Victimization Survey, which collects information annually from a nationally representative sample of tens of thousands of US households every six months, asks about sexual assault among 12- to 17-year-olds and found a 69 percent decline in the annual rate of sexual assaults against teens from 1993 to 2008.
– The Minnesota Student Survey, conducted every three years among sixth, ninth and 12th grade public school students in selected school districts, asks about sexual abuse by family members and non-family members. The survey found between 1992 and 2010 that there was a 29 percent decline in sexual abuse by non-family members and a 28 percent decline in abuse by family members.