Year	per 100,000 population
2000	2.3
2001	2.5
2002	2.3
2003	2.4
2004	3.2
2005	3
2006	3.5
2007	3.2
2008	3.3
2009	3.3
2010	3.6
2011	3.7
2012	3.5
2013	3.1
2014	3.3
2015	3.5
2016	3.6
2017	3.4
2018	3.5
2019	3.5