– The National Child Abuse and Neglect Data System, which aggregates data from state child protective agencies, shows a 62 percent decline in rates of substantiated sexual abuse between 1992 and 2010. The raw numbers showed a drop from 150,000 to 63,000 cases, primarily in cases involving abuse by family members and other caregivers, who are statistically the most likely perpetrators in child sex abuse cases, although they are less likely to be the subject of news stories.
– 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.