Year	per 100,000 population
2000	14.1
2001	13.3
2002	12.7
2003	12.4
2004	12.1
2005	11.5
2006	11.6
2007	11.5
2008	10.6
2009	11
2010	11.4
2011	11.1
2012	11.3
2013	11.1
2014	10.5
2015	10
2016	9.6
2017	9.2
2018	9
2019	8.9