Year	per 100,000 population
2000	25.6
2001	21
2002	18.6
2003	18.8
2004	16.6
2005	16.1
2006	15.9
2007	15.4
2008	15
2009	14.7
2010	13.7
2011	12.8
2012	12.7
2013	11.8
2014	10.9
2015	10.6
2016	9.8
2017	9.5
2018	8.6
2019	8.6