[US] Nonfatal Maltreatment of Infants — United States, October 2005–September 2006 / Centers for Disease, Control and Prevention, April 2008
http://www.cdc.gov/mmwr/preview/mmwrhtml/mm5713a2.htm
"During October 2005–September 2006 (federal fiscal year 2006), approximately 905,000 U.S. children were victims of maltreatment that was substantiated by state and local child protective services (CPS) agencies."