Table 232.50.

Percentage distribution of students in grades 9-12, by number of times they reported using marijuana anywere or on school property during the previous 30 days and selected student characteristics: 2011

[Standard errors appear in parentheses]
Student characteristic	Anywhere (including on school property)1										On school property2
	0 times		1 or 2 times		3 to 39 times			40 or more times			0 times		1 or 2 times			3 to 39 times			40 or more times
1	2		3		4			5			6		7			8			9
Total	76.9	(0.80)	7.4	(0.30)	10.9		(0.42)	4.8		(0.30)	94.1	(0.39)	2.8		(0.22)	2.3		(0.21)	0.7		(0.09)
Sex
Male	74.1	(1.01)	7.1	(0.40)	11.8		(0.57)	7.0		(0.47)	92.5	(0.56)	3.1		(0.28)	3.2		(0.31)	1.2		(0.17)
Female	79.9	(0.95)	7.7	(0.48)	9.9		(0.56)	2.4		(0.26)	95.9	(0.32)	2.5		(0.21)	1.4		(0.19)	0.2		(0.04)
Race/ethnicity3
White	78.3	(1.09)	6.9	(0.42)	10.2		(0.59)	4.6		(0.44)	95.5	(0.42)	2.2		(0.26)	1.9		(0.23)	0.4		(0.09)
Black	74.9	(1.35)	7.9	(0.69)	12.5		(0.81)	4.7		(0.63)	93.3	(0.77)	3.2		(0.43)	2.8		(0.52)	0.7		(0.18)
Hispanic	75.6	(1.27)	8.3	(0.59)	11.5		(0.67)	4.7		(0.46)	92.3	(0.54)	3.6		(0.26)	3.1		(0.40)	1.0		(0.21)
Asian	86.4	(3.75)	‡	(†)	5.5		(0.96)	3.2	!	(1.34)	95.5	(1.34)	2.4	!	(1.15)	‡		(†)	1.5	!	(0.70)
Pacific Islander	68.9	(7.08)	11.3	(3.34)	13.2	!	(5.20)	6.6	!	(2.27)	87.5	(4.94)	5.6	!	(2.24)	‡		(†)	‡		(†)
American Indian/Alaska Native	52.6	(3.20)	10.5	(2.82)	23.6		(2.57)	13.2		(1.81)	79.1	(4.05)	8.6		(2.18)	9.8		(1.79)	2.5		(0.67)
Two or more races	73.2	(2.10)	7.2	(1.20)	12.9		(1.44)	6.7		(1.33)	91.9	(1.79)	3.7		(0.98)	2.4	!	(0.86)	2.0	!	(0.69)
Grade
9th	82.0	(1.11)	6.2	(0.47)	8.2		(0.63)	3.6		(0.42)	94.6	(0.65)	2.7		(0.41)	2.2		(0.33)	0.5		(0.11)
10th	78.4	(1.15)	7.4	(0.60)	10.0		(0.65)	4.3		(0.50)	93.8	(0.63)	3.2		(0.38)	2.3		(0.40)	0.7		(0.16)
11th	74.5	(1.44)	8.0	(0.59)	12.9		(0.82)	4.5		(0.50)	93.8	(0.70)	3.2		(0.47)	2.3		(0.35)	0.7		(0.16)
12th	72.0	(1.08)	8.3	(0.59)	13.0		(0.69)	6.7		(0.53)	94.6	(0.39)	2.2		(0.30)	2.4		(0.30)	0.8		(0.18)

†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 The term "anywhere" is not used in the Youth Risk Behavior Survey (YRBS) questionnaire; students were simply asked how many times during the previous 30 days they had used marijuana.

2 In the question about using marijuana at school, "on school property" was not defined for survey respondents.

3 Race categories exclude persons of Hispanic ethnicity.

NOTE: 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), 2011. (This table was prepared September 2013.)