Year	per 100,000 population
2000	18.2
2001	17.5
2002	17.5
2003	15.1
2004	14.2
2005	13.3
2006	13.4
2007	12.5
2008	13.2
2009	12.3
2010	12.4
2011	11
2012	12.5
2013	10.5
2014	10.4
2015	9.8
2016	9.7
2017	10.3
2018	9.7
2019	9.7