Year	per 100,000 population
2000	39.1
2001	36.7
2002	36
2003	34.5
2004	33.8
2005	33.8
2006	30.8
2007	31.5
2008	30.9
2009	26.3
2010	24.5
2011	23
2012	23.1
2013	22.6
2014	24.4
2015	21.6
2016	21.4
2017	20.6
2018	21.9
2019	21.6