"In 2011, an estimated 31.4 million U.S. residents age 16 or older, or 13% of the population, requested assistance from the police at least once. About 93% of persons who requested police assistance thought the officers acted properly, 86% felt the police were helpful, and 85% were satisfied with the police response (figure 1). About 93% of persons who requested police assistance reported that they were just as likely or more likely to contact the police again for a similar problem. The findings in this report are based on the Bureau of Justice Statistics' (BJS) 2011 Police-Public Contact Survey (PPCS), a supplement to the National Crime Victimization Survey (NCVS), which collects information from a nationally representative sample of persons in U.S. households. The PPCS collects information on contact with police during a 12-month period. This report presents the characteristics and experiences of persons who contacted law enforcement for assistance in 2011, examining perceptions of officer behavior and response during these encounters. It details requests for police assistance to (1) report a crime, suspicious activity, or neighborhood disturbance; (2) report a noncrime emergency; and (3) seek help for a nonemergency or other reason."
U.S. Bureau of Justice Statistics: http://www.bjs.gov/