Year	per 100,000 population
2000	35.9
2001	35.3
2002	33.1
2003	35.6
2004	35.6
2005	29.7
2006	32.9
2007	30.9
2008	28.4
2009	24.6
2010	22.3
2011	21.1
2012	19
2013	19
2014	20.4
2015	20.8
2016	22.2
2017	20.6
2018	20.8
2019	20.9