Year	per 100,000 population
2000	17.2
2001	18.6
2002	17.7
2003	18.5
2004	18.3
2005	19.4
2006	19.7
2007	17.2
2008	19.1
2009	19.7
2010	20.5
2011	15.3
2012	17
2013	17
2014	17.2
2015	16.2
2016	15.9
2017	14.9
2018	14.4
2019	14.7