Year	per 100,000 population
2000	13.9
2001	13.9
2002	13.3
2003	11.8
2004	10.9
2005	10.3
2006	10.3
2007	9.7
2008	8.9
2009	8
2010	7.3
2011	7.2
2012	6.5
2013	5.8
2014	5.8
2015	5.9
2016	5.5
2017	5.7
2018	5.6
2019	5.3