Year	per 100,000 population
2000	6.2
2001	6.2
2002	5.9
2003	6.1
2004	5.9
2005	6
2006	6.5
2007	6.8
2008	6.8
2009	6.5
2010	6.7
2011	6.1
2012	5.4
2013	5.3
2014	5.1
2015	5
2016	4.7
2017	4.7
2018	4.7
2019	4.9