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Table 49. Percentage of high school students involved in behaviors that may endanger their safety, by type of behavior and sex: Selected years, 1991 through 2009
 
Behavior 1991 1993 1995 1997 1999 2001 2003 2005 2007 2009
Carried a weapon1,2                    
Total 26.1 22.1 20.1 18.3 17.3 17.4 17.1 18.5 18.0 17.5
Male 40.6 34.3 31.1 27.7 28.6 29.3 26.9 29.8 28.5 27.1
Female 10.9 9.2 8.3 7.0 6.0 6.2 6.8 7.1 7.5 7.1
                     
Carried a gun1                    
Total 7.9 7.6 5.9 4.9 5.7 6.1 5.4 5.2 5.9
Male 13.7 12.3 9.6 9.0 10.3 10.2 9.9 9.0 9.8
Female 1.8 2.5 1.5 0.8 1.3 1.7 1.0 1.2 1.7
                     
Drove after drinking alcohol1                    
Total 16.7 13.5 15.4 16.9 13.1 13.3 12.1 9.9 10.5 9.7
Male 21.5 17.6 18.5 21.0 17.4 17.2 15.0 11.7 12.9 11.6
Female 11.7 9.1 11.9 12.0 8.7 9.5 8.9 8.1 8.1 7.6
                     
Rode with a driver who had been
drinking alcohol
1
                   
Total 40.0 35.3 38.8 36.6 33.1 30.7 30.2 28.5 29.2 28.3
Male 40.1 36.3 39.5 38.3 34.4 31.8 29.2 27.2 29.5 27.8
Female 39.8 34.5 37.8 34.5 31.7 29.6 31.1 29.6 28.8 28.8
                     
Engaged in a physical fight3                    
Total 42.5 41.8 38.7 36.6 35.7 33.2 33.0 35.9 35.5 31.5
Male 50.3 51.2 46.1 45.5 44.0 43.1 40.5 43.4 44.4 39.3
Female 34.4 31.7 30.6 26.0 27.3 23.9 25.1 28.2 26.6 22.9
                     
Injured in a physical fight3,4                    
Total 4.4 4.0 4.2 3.5 4.0 4.0 4.2 3.6 4.2 3.8
Male 6.0 5.2 5.7 4.6 5.3 5.2 5.7 4.8 5.5 5.1
Female 2.7 2.7 2.5 2.2 2.8 2.9 2.6 2.4 2.9 2.2
– Not available.
1 One or more times during the 30 days preceding the survey.                    
2 Examples of a weapon are a gun, knife, or club.                    
3 One or more times during the 12 months preceding the survey.                    
4 Physical fight resulting in injury requiring attention by a doctor or nurse.                    
SOURCE: U.S. Department of Health and Human Services, Centers for Disease Control and Prevention (CDC), Morbidity and Mortality Weekly Report, Youth Risk Behavior Surveillance—United States, selected years, 1991–2009.

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