Year	per 100,000 population
2000	3.6
2001	3.6
2002	3.4
2003	3.4
2004	3.1
2005	3
2006	2.7
2007	2.6
2008	2.4
2009	3.1
2010	3
2011	3.2
2012	3.3
2013	3.3
2014	3.4
2015	3.5
2016	3.6
2017	3.6
2018	3.6
2019	3.7