Table 228.40.

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 selected student characteristics and number of times threatened or injured: Selected years, 1993 through 2015

[Standard errors appear in parentheses]
Number of times and year	Total		Sex					Race/ethnicity1																			Grade
			Male		Female			White		Black			Hispanic		Asian2			Pacific Islander2			American Indian/ Alaska Native			Two or more races2			9th grade		10th grade		11th grade			12th grade
1	2		3		4			5		6			7		8			9			10			11			12		13		14			15
At least once
1993	7.3	(0.44)	9.2	(0.64)	5.4		(0.40)	6.3	(0.58)	11.2		(0.95)	8.6	(0.83)	—		(†)	—		(†)	11.7		(2.50)	—		(†)	9.4	(0.92)	7.3	(0.59)	7.3		(0.64)	5.5		(0.62)
1995	8.4	(0.52)	10.9	(0.57)	5.8		(0.68)	7.0	(0.53)	11.0		(1.61)	12.4	(1.44)	—		(†)	—		(†)	11.4	!	(4.22)	—		(†)	9.6	(0.96)	9.6	(1.03)	7.7		(0.64)	6.7		(0.57)
1997	7.4	(0.45)	10.2	(0.71)	4.0		(0.32)	6.2	(0.56)	9.9		(0.91)	9.0	(0.63)	—		(†)	—		(†)	12.5	!	(5.15)	—		(†)	10.1	(1.02)	7.9	(1.14)	5.9		(0.70)	5.8		(0.80)
1999	7.7	(0.42)	9.5	(0.80)	5.8		(0.64)	6.6	(0.35)	7.6		(0.85)	9.8	(1.09)	7.7		(1.05)	15.6		(4.46)	13.2	!	(5.45)	9.3		(1.22)	10.5	(0.95)	8.2	(0.92)	6.1		(0.46)	5.1		(0.79)
2001	8.9	(0.55)	11.5	(0.66)	6.5		(0.52)	8.5	(0.66)	9.3		(0.71)	8.9	(1.05)	11.3		(2.73)	24.8		(7.16)	15.2	!	(4.57)	10.3		(2.33)	12.7	(0.89)	9.1	(0.75)	6.9		(0.65)	5.3		(0.52)
2003	9.2	(0.75)	11.6	(0.96)	6.5		(0.61)	7.8	(0.77)	10.9		(0.80)	9.4	(1.23)	11.5		(2.66)	16.3		(4.31)	22.1		(4.79)	18.7		(3.11)	12.1	(1.25)	9.2	(1.02)	7.3		(0.69)	6.3		(0.92)
2005	7.9	(0.35)	9.7	(0.42)	6.1		(0.41)	7.2	(0.46)	8.1		(0.69)	9.8	(0.86)	4.6		(1.10)	14.5	!	(4.93)	9.8		(2.67)	10.7		(2.33)	10.5	(0.63)	8.8	(0.72)	5.5		(0.43)	5.8		(0.52)
2007	7.8	(0.44)	10.2	(0.59)	5.4		(0.41)	6.9	(0.52)	9.7		(0.86)	8.7	(0.60)	7.6	!	(2.29)	8.1	!	(2.45)	5.9		(1.24)	13.3		(2.25)	9.2	(0.69)	8.4	(0.51)	6.8		(0.57)	6.3		(0.64)
2009	7.7	(0.37)	9.6	(0.59)	5.5		(0.37)	6.4	(0.43)	9.4		(0.80)	9.1	(0.61)	5.5		(0.91)	12.5		(3.11)	16.5		(2.68)	9.2		(1.50)	8.7	(0.53)	8.4	(0.72)	7.9		(0.60)	5.2		(0.53)
2011	7.4	(0.31)	9.5	(0.39)	5.2		(0.37)	6.1	(0.35)	8.9		(0.64)	9.2	(0.81)	7.0		(0.99)	11.3		(3.23)	8.2		(1.52)	9.9		(1.35)	8.3	(0.63)	7.7	(0.58)	7.3		(0.61)	5.9		(0.45)
2013	6.9	(0.38)	7.7	(0.54)	6.1		(0.40)	5.8	(0.32)	8.4		(0.82)	8.5	(0.73)	5.3		(1.41)	8.7	!	(2.71)	18.5		(5.24)	7.7		(2.11)	8.5	(0.75)	7.0	(0.67)	6.8		(0.60)	4.9		(0.61)
2015	6.0	(0.38)	7.0	(0.50)	4.6		(0.42)	4.9	(0.50)	7.9		(1.10)	6.6	(0.65)	3.6	!	(1.40)	20.5	!	(7.28)	8.2	!	(2.69)	8.0		(1.82)	7.2	(0.51)	6.2	(0.57)	5.5		(0.68)	4.4		(0.69)
Number of times, 2015
0 times	94.0	(0.38)	93.0	(0.50)	95.4		(0.42)	95.1	(0.50)	92.1		(1.10)	93.4	(0.65)	96.4		(1.40)	79.5		(7.28)	91.8		(2.69)	92.0		(1.82)	92.8	(0.51)	93.8	(0.57)	94.5		(0.68)	95.6		(0.69)
1 time	2.7	(0.22)	3.1	(0.30)	2.3		(0.23)	2.4	(0.24)	4.1		(0.80)	2.6	(0.36)	‡		(†)	‡		(†)	‡		(†)	3.8	!	(1.37)	3.5	(0.36)	2.9	(0.35)	2.5		(0.45)	1.8		(0.34)
2 or 3 times	1.5	(0.16)	1.6	(0.19)	1.3		(0.23)	1.5	(0.25)	1.6	!	(0.47)	1.4	(0.27)	0.5	!	(0.25)	‡		(†)	3.1	!	(1.18)	1.7	!	(0.71)	2.1	(0.34)	1.3	(0.26)	1.1		(0.20)	1.3		(0.29)
4 to 11 times	1.0	(0.14)	1.3	(0.21)	0.6		(0.12)	0.6	(0.12)	1.4	!	(0.51)	1.4	(0.24)	‡		(†)	‡		(†)	‡		(†)	1.2	!	(0.52)	0.9	(0.15)	1.3	(0.28)	1.1	!	(0.33)	0.7	!	(0.23)
12 or more times	0.8	(0.12)	1.0	(0.18)	0.4	!	(0.12)	0.4	(0.10)	0.9	!	(0.34)	1.2	(0.19)	‡		(†)	‡		(†)	‡		(†)	1.3	!	(0.60)	0.6	(0.15)	0.7	(0.15)	0.8		(0.23)	0.6		(0.17)

—Not available.

†Not applicable.

!Interpret data with caution. The coefficient of variation (CV) for this estimate is between 30 and 50 percent.

‡Reporting standards not met. Either there are too few cases for a reliable estimate or the coefficient of variation (CV) is 50 percent or greater.

1 Race categories exclude persons of Hispanic ethnicity.

2 Before 1999, Asian students and Pacific Islander students were not categorized separately, and students could not be classified as Two or more races. Because the response categories changed in 1999, caution should be used in comparing data on race from 1993, 1995, and 1997 with data from later years.

NOTE: Survey respondents were asked about being threatened or injured "with a weapon such as a gun, knife, or club on school property." "On school property" was not defined for respondents. Detail may not sum to totals because of rounding.

SOURCE: Centers for Disease Control and Prevention, Division of Adolescent and School Health, Youth Risk Behavior Surveillance System (YRBSS), 1993 through 2015. (This table was prepared June 2016.)