Year	per 100,000 population
2000	29.2
2001	25.9
2002	25.8
2003	24.6
2004	23.5
2005	21.4
2006	20
2007	20.1
2008	18.5
2009	12.3
2010	11.8
2011	9
2012	10.1
2013	9.9
2014	12.4
2015	11.2
2016	9.3
2017	8.1
2018	9.1
2019	8.1