Never | 97.5 statistically significant differences at chi2 test between boys and girls(p<0.05) statistically significant differences at chi 2 test between the samples from 1999 and 2003 (p<0.05) statistically significant differences at chi 2 test between the samples from 1999 and 2011 (p<0.05) | 85.8 statistically significant differences at chi 2 test between the samples from 1999 and 2011 (p<0.05) | 92.5 statistically significant differences at chi2 test between boys and girls(p<0.05) statistically significant differences at chi 2 test between the samples from 2003 and 2011 (p<0.05) | 81.9 statistically significant differences at chi 2 test between the samples from 2003 and 2011 (p<0.05) | 85 statistically significant differences at chi2 test between boys and girls(p<0.05) | 69.4 |
1-2 times | 1.7 statistically significant differences at chi2 test between boys and girls(p<0.05) statistically significant differences at chi 2 test between the samples from 1999 and 2011 (p<0.05) | 10 | 4.4 statistically significant differences at chi2 test between boys and girls(p<0.05) | 11.9 | 7.5 statistically significant differences at chi2 test between boys and girls(p<0.05) | 15.6 |
More than 2 times | 0.8 statistically significant differences at chi2 test between boys and girls(p<0.05) statistically significant differences at chi 2 test between the samples from 1999 and 2011 (p<0.05) | 4.2 statistically significant differences at chi 2 test between the samples from 1999 and 2011 (p<0.05) | 3.1 statistically significant differences at chi2 test between boys and girls(p<0.05) | 6.2 statistically significant differences at chi 2 test between the samples from 2003 and 2011 (p<0.05) | 7.5 statistically significant differences at chi2 test between boys and girls(p<0.05) | 15 |
0 | 0 | 0 | 0.6 statistically significant differences at chi 2 test between the samples from 2003 and 2011 (p<0.05) | 2.5 statistically significant differences at chi2 test between boys and girls(p<0.05) | 6.2 | |
Herbal cannabis/cannabis resin | 2.5 statistically significant differences at chi2 test between boys and girls(p<0.05) statistically significant differences at chi 2 test between the samples from 1999 and 2003 (p<0.05) statistically significant differences at chi 2 test between the samples from 1999 and 2011 (p<0.05) | 14.2 statistically significant differences at chi 2 test between the samples from 1999 and 2011 (p<0.05) | 7.5 statistically significant differences at chi2 test between boys and girls(p<0.05) statistically significant differences at chi 2 test between the samples from 2003 and 2011 (p<0.05) | 17.5 statistically significant differences at chi2 test between boys and girls(p<0.05) statistically significant differences at chi 2 test between the samples from 2003 and 2011 (p<0.05) | 14.4 statistically significant differences at chi2 test between boys and girls(p<0.05) | 29.4 |
Cocaine | 0 | 2.4 | 0 | 2.5 | 0 | 3.7 |
Amphetamines | 0 | 0 | 1.2 | 3.7 | 2.5 | 3.1 |
Ecstasy | 0 statistically significant differences at chi 2 test between the samples from 1999 and 2011 (p<0.05) | 0.8 statistically significant differences at chi 2 test between the samples from 1999 and 2003 (p<0.05) statistically significant differences at chi 2 test between the samples from 1999 and 2011 (p<0.05) | 1.2 statistically significant differences at chi2 test between boys and girls(p<0.05) statistically significant differences at chi 2 test between the samples from 2003 and 2011 (p<0.05) | 5c | 5.6 statistically significant differences at chi2 test between boys and girls(p<0.05) | 11.2 |
LSD | 0 | 0 | 0 | 2.5 | 1.2 | 2.5 |
Heroin | 0 | 0.8 | 0 | 0.6 | 0 | 0 |
0 statistically significant differences at chi2 test between boys and girls(p<0.05) statistically significant differences at chi 2 test between the samples from 1999 and 2011 (p<0.05) | 3.8 statistically significant differences at chi 2 test between the samples from 1999 and 2011 (p<0.05) | 2.7 statistically significant differences at chi2 test between boys and girls(p<0.05) statistically significant differences at chi 2 test between the samples from 2003 and 2011 (p<0.05) | 6.1 statistically significant differences at chi 2 test between the samples from 2003 and 2011 (p<0.05) | 7.3 statistically significant differences at chi2 test between boys and girls(p<0.05) | 11.7 | |
Probably yes | 0 | 0 | 0 | 2.5 statistically significant differences at chi 2 test between the samples from 2003 and 2011 (p<0.05) | 2.9 statistically significant differences at chi2 test between boys and girls(p<0.05) | 7.6 |
Definitely yes | 0 | 0 | 0 | 0 | 0 | 0 |
Probably yes | 0 statistically significant differences at chi 2 test between the samples from 1999 and 2011 (p<0.05) | 5.8 | 8.33 | 10.3 | 12.5 | 14.3 |
Definitely yes | 0 | 0 | 0 | 0 | 0 | 0 |