Year	per 100,000 population
2000	11.7
2001	10.8
2002	10.2
2003	9.7
2004	9.2
2005	8.9
2006	8.9
2007	8.4
2008	7.9
2009	7.7
2010	7.6
2011	7.4
2012	7.1
2013	7
2014	6.7
2015	6.4
2016	6.4
2017	6.4
2018	6.3
2019	6.2