Year	per 100,000 population
2000	8.9
2001	7.9
2002	7
2003	6.4
2004	5.8
2005	5.4
2006	5.3
2007	5.4
2008	5.8
2009	5.5
2010	5
2011	4.8
2012	4.3
2013	4.4
2014	4.2
2015	4.2
2016	4.2
2017	4.2
2018	4.2
2019	4.3