Year	per 100,000 population
2000	5.4
2001	5.7
2002	5.3
2003	5.9
2004	5.8
2005	5
2006	5.7
2007	4.9
2008	5.4
2009	4.8
2010	4.2
2011	3.8
2012	3.6
2013	3.4
2014	4.1
2015	2.9
2016	3.3
2017	3.2
2018	2.9
2019	2.9