Year	per 100,000 population
2000	6.3
2001	6.2
2002	5.9
2003	5.8
2004	5.5
2005	5.4
2006	5.4
2007	5.3
2008	5.4
2009	5
2010	5.6
2011	5.1
2012	5.2
2013	5.2
2014	5.5
2015	5.5
2016	5.5
2017	5.4
2018	5.4
2019	5.4