Figure 4.1. |
Percentage of students in grades 9–12 who reported being threatened or injured with a weapon on school property during the previous 12 months, by sex: Various years, 1993–2007 |
| NOTE: "On school property" was not defined for survey respondents. |
| SOURCE: Centers for Disease Control and Prevention, National Center for Chronic Disease Prevention and Health Promotion, Youth Risk Behavior Surveillance System (YRBSS), various years, 1993–2007. |
