Table 5.  Percentage of students ages 12 through 18 who reported no criminal victimization at school and those who reported criminal victimization at school, by student reports of the use of selected security measures to secure school buildings and type of victimization: School year 2008–09

Type of victimization	Locker checks	Metal detectors	Security cameras	Locked entrance or exit doors during the day
Total	53.8	10.6	70.0	64.3
None	53.7	10.5	69.7	64.3
Victimization Any	54.4	11.7	78.5	65.0
Theft	54.2	13.5	80.9	71.8
Violent	54.2	9.8 !	77.3	55.0
! Interpret data with caution. The standard error for this estimate is from 30 percent to 50 percent of the estimate's value. NOTE: "Theft" includes attempted and completed purse snatching, completed pickpocketing, and all attempted and completed thefts, excluding motor vehicle theft. Theft does not include robbery, in which the threat or use of force is involved. "Violent" includes rape, sexual assault, robbery, aggravated assault, and simple assault. "Any" includes violent crimes and theft. "At school" includes inside the school building, on school property, on the school bus, and on the way to or from school. Population size for students ages 12 through 18 is 25,383,000. SOURCE: U.S. Department of Justice, Bureau of Justice Statistics, School Crime Supplement (SCS) to the National Crime Victimization Survey (NCVS), 2009.