Table 232.50.

Percentage distribution of students in grades 9-12, by number of times they reported using marijuana anywhere or on school property during the previous 30 days and selected student characteristics: Selected years, 2009 through 2013

[Standard errors appear in parentheses]
Year and 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
2009
Total	79.2	(0.70)	7.2		(0.30)	9.7		(0.37)	3.8		(0.27)	95.4	(0.35)	2.1		(0.16)	1.8		(0.18)	0.7		(0.10)
Sex
Male	76.6	(0.80)	6.8		(0.38)	10.8		(0.48)	5.8		(0.46)	93.7	(0.54)	2.6		(0.24)	2.6		(0.27)	1.1		(0.18)
Female	82.1	(0.87)	7.7		(0.39)	8.5		(0.56)	1.7		(0.20)	97.2	(0.32)	1.7		(0.19)	1.0		(0.21)	0.2		(0.06)
Race/ethnicity3
White	79.3	(0.93)	7.4		(0.43)	9.6		(0.49)	3.7		(0.38)	96.2	(0.38)	1.9		(0.21)	1.4		(0.18)	0.5		(0.10)
Black	77.8	(1.44)	6.7		(0.62)	10.9		(0.90)	4.6		(0.68)	94.4	(0.64)	2.2		(0.31)	2.8		(0.44)	0.6	!	(0.24)
Hispanic	78.4	(1.04)	8.2		(0.57)	9.8		(0.71)	3.6		(0.37)	93.5	(0.76)	3.2		(0.43)	2.3		(0.39)	1.0		(0.22)
Asian	92.5	(1.40)	3.0		(0.69)	3.3		(0.85)	1.2	!	(0.55)	98.0	(0.54)	‡		(†)	1.1	!	(0.50)	‡		(†)
Pacific Islander	75.2	(5.50)	5.0	!	(1.61)	13.0		(2.95)	6.8	!	(2.56)	91.0	(2.40)	4.4	!	(1.59)	3.7	!	(1.58)	‡		(†)
American Indian/Alaska Native	68.4	(5.26)	6.7	!	(2.47)	19.6		(3.43)	5.3	!	(2.11)	97.1	(1.25)	‡		(†)	‡		(†)	#		(†)
Two or more races	78.3	(2.33)	7.8		(1.40)	9.8		(1.51)	4.1	!	(1.27)	94.6	(1.34)	1.4	!	(0.51)	2.2	!	(0.90)	1.8	!	(0.66)
Grade
9th	84.5	(0.97)	5.8		(0.55)	7.6		(0.55)	2.1		(0.29)	95.7	(0.38)	2.3		(0.22)	1.4		(0.21)	0.6		(0.15)
10th	78.9	(1.11)	7.9		(0.59)	9.6		(0.64)	3.6		(0.44)	95.4	(0.50)	1.9		(0.28)	2.1		(0.35)	0.6		(0.12)
11th	76.8	(1.52)	7.9		(0.66)	11.2		(0.89)	4.1		(0.42)	95.0	(0.55)	2.5		(0.37)	2.0		(0.31)	0.5		(0.12)
12th	75.4	(1.49)	7.7		(0.60)	10.9		(0.86)	6.0		(0.64)	95.4	(0.49)	1.9		(0.30)	1.9		(0.27)	0.8		(0.23)
2011
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)
20134
Total	76.6	(1.08)	7.1		(0.42)	11.3		(0.68)	5.0		(0.39)	—	(†)	—		(†)	—		(†)	—		(†)
Sex
Male	75.0	(1.14)	6.5		(0.42)	12.0		(0.72)	6.5		(0.53)	—	(†)	—		(†)	—		(†)	—		(†)
Female	78.1	(1.28)	7.8		(0.59)	10.7		(0.77)	3.4		(0.36)	—	(†)	—		(†)	—		(†)	—		(†)
Race/ethnicity3
White	79.6	(1.36)	6.3		(0.63)	9.7		(0.75)	4.4		(0.42)	—	(†)	—		(†)	—		(†)	—		(†)
Black	71.1	(1.30)	8.2		(0.52)	14.3		(0.90)	6.3		(0.71)	—	(†)	—		(†)	—		(†)	—		(†)
Hispanic	72.4	(1.50)	8.6		(0.52)	13.4		(1.22)	5.6		(0.70)	—	(†)	—		(†)	—		(†)	—		(†)
Asian	83.6	(2.99)	4.1		(1.02)	7.6		(1.32)	4.7	!	(2.03)	—	(†)	—		(†)	—		(†)	—		(†)
Pacific Islander	76.6	(7.35)	4.9	!	(2.31)	17.1	!	(5.82)	‡		(†)	—	(†)	—		(†)	—		(†)	—		(†)
American Indian/Alaska Native	64.5	(6.37)	8.8	!	(2.70)	18.9		(4.54)	7.9	!	(2.77)	—	(†)	—		(†)	—		(†)	—		(†)
Two or more races	71.2	(2.55)	9.7		(1.36)	12.4		(1.45)	6.7		(1.29)	—	(†)	—		(†)	—		(†)	—		(†)
Grade
9th	82.3	(1.13)	6.3		(0.59)	8.6		(0.70)	2.8		(0.38)	—	(†)	—		(†)	—		(†)	—		(†)
10th	76.5	(1.89)	7.2		(0.65)	11.3		(1.35)	5.0		(0.81)	—	(†)	—		(†)	—		(†)	—		(†)
11th	74.5	(1.37)	7.6		(0.68)	12.0		(0.85)	6.0		(0.56)	—	(†)	—		(†)	—		(†)	—		(†)
12th	72.3	(1.58)	7.6		(0.68)	13.8		(1.00)	6.4		(0.63)	—	(†)	—		(†)	—		(†)	—		(†)

—Not available.

†Not applicable.

#Rounds to zero.

!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.

4 Data on marijuana use at school were not collected in 2013.

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), 2009 through 2013. (This table was prepared September 2014.)