Year	per 100,000 population
2000	10.8
2001	9.8
2002	8.8
2003	8.2
2004	7.8
2005	7.2
2006	7.5
2007	7.8
2008	7.6
2009	8
2010	8.2
2011	7.3
2012	6.8
2013	6.4
2014	6.3
2015	6.2
2016	6.1
2017	5.9
2018	5.6
2019	5.4