Year	per 100,000 population
2000	35.3
2001	34.5
2002	32.7
2003	31.2
2004	31.8
2005	34
2006	32
2007	29.3
2008	28.4
2009	25.1
2010	24.4
2011	22.7
2012	22.6
2013	21.6
2014	19.6
2015	19
2016	17.8
2017	17.4
2018	17.4
2019	16.1