Year	per 100,000 population
2000	9.8
2001	9.2
2002	9.7
2003	9.1
2004	8.9
2005	9.5
2006	9.1
2007	8.9
2008	8
2009	7.2
2010	7.3
2011	6.3
2012	6.7
2013	6.3
2014	5.8
2015	5.8
2016	5.8
2017	5.6
2018	5.4
2019	5.3