Table 2.

Prevalence of cannabis use in the last 12 month in 2002 and 2006 (in percent) according to gender and country

	Boys			Girls
	2002	2006	Change	2002	2006	Change
Canada	43.2	30.2	−13.0***	37.4	27.6	−9.8***
Switzerland	39.8	26.8	−13.0***	35.4	23.1	−12.3***
United States	36.3	24.4	−11.9***	26.2	24.2	−2.0
Estonia	18.1	24.0	+5.9**	10.8	14.3	+3.5*
Spain	31.6	23.9	−7.7***	29.9	23.9	−6.0**
France	31.0	23.0	−8.0***	23.6	20.7	−2.9
Wales	26.3	22.7	−3.6	24.3	24.4	+0.1
Scotland	31.3	22.5	−8.8***	29.6	21.4	−8.2***
The Netherlands	24.3	21.6	−2.7	19.3	18.0	−1.3
England	37.4	21.2	−16.2***	32.4	18.6	−13.8***
Italy	23.5	20.7	−2.8	16.7	15.1	−1.6
Ireland	25.6	20.6	−5.0	14.4	15.4	+1.0
Czech Republic	30.9	20.3	−10.6***	23.1	18.3	−4.8*
Belgium (French)	28.5	20.2	−8.3**	19.8	14.8	−5.0*
Belgium (Flemish)	22.8	19.2	−3.6	20.7	12.7	−8.0***
Poland	20.7	18.5	−2.2	9.4	8.8	−0.6
Slovenia	27.1	15.1	−12.0***	21.5	10.0	−11.5***
Denmark	24.1	14.3	−9.8***	18.8	9.4	−9.4***
Ukraine	21.0	14.1	−6.9***	7.7	5.2	−2.5*
Germany	22.3	12.8	−9.5***	14.9	10.2	−4.7**
Russia	13.3	12.8	−0.5	5.1	8.6	+3.5**
Lithuania	8.7	10.6	+1.9	3.0	6.0	+3.0**
Austria	12.3	10.3	−2.0	10.5	8.3	−2.2
Hungary	15.2	10.3	−4.9*	9.7	7.8	−1.9
Portugal	24.9	9.8	−15.1***	14.5	5.9	−8.6***
Malta	7.0	9.7	+2.7	4.2	9.8	+5.6*
Finland	7.8	7.0	−0.8	6.8	4.3	−2.5*
Israel	9.0	6.8	−2.2	4.2	2.2	−2.0*
Greece	6.4	4.1	−2.3	2.1	1.9	−0.2
Sweden	4.9	3.9	−1.0	4.5	2.5	−2.0
FYRO Macedonia	3.9	3.7	−0.2	2.2	2.2	0.0

Note. Countries ordered by prevalence in 2006 among boys; χ²-tests (df=1):

^*p < .05

^**p < .01

^***p < .001