Year	per 100,000 population
2000	38.7
2001	39
2002	38.2
2003	39.2
2004	39.7
2005	39.2
2006	38
2007	38
2008	34.6
2009	30.3
2010	29.9
2011	28.7
2012	27.6
2013	26.3
2014	24.2
2015	23.2
2016	21.7
2017	20.8
2018	19
2019	17.6