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Table 2 Distribution of anya and frequentb cannabis use across years among boys and girls in the 8th or 9th grades of comprehensive school in Finland (%)

From: Changes in cannabis use according to socioeconomic status among Finnish adolescents from 2000 to 2015

Boys
  2000–2001 (n = 42685) 2002–2003 (n = 51309) 2004–2005 (n = 53499) 2006–2007 (n = 54841) 2008–2009 (n = 54433) 2010–2011 (n = 51329) 2012–2013 (n = 50223) 2014–2015 (n = 25147)
Any cannabis use 9.1 9.1 7.1 6.1 6.5 8.6 9.8 10.1
Frequent cannabis use 2.9 3.0 2.4 2.1 2.2 3.2 3.7 5.0
Girls
  2000–2001 (n = 42122) 2002–2003 (n = 49481) 2004–2005 (n = 51979) 2006–2007 (n = 54286) 2008–2009 (n = 54216) 2010–2011 (n = 51216) 2012–2013 (n = 49255) 2014–2015 (n = 25257)
Any cannabis use 8.0 7.7 6.0 4.6 4.4 5.8 6.4 6.2
Frequent cannabis use 1.8 1.7 1.3 1.0 1.0 1.3 1.7 2.2
  1. aUsed cannabis at least once in one’s lifetime
  2. bUsed cannabis at least five times in one’s lifetime