Year	per 100,000 population
2000	10.2
2001	9.8
2002	9.4
2003	9.4
2004	9.5
2005	9.7
2006	9.4
2007	8
2008	7.1
2009	6.8
2010	6.3
2011	6.3
2012	5.7
2013	5.2
2014	4.8
2015	4.7
2016	4.7
2017	4.4
2018	4.4
2019	4.6