Year	per 100,000 population
2000	3.2
2001	3.3
2002	3.4
2003	3.5
2004	3.4
2005	3.7
2006	4
2007	4.3
2008	4.6
2009	5
2010	5.5
2011	6.1
2012	6.4
2013	6.5
2014	6.6
2015	6.3
2016	6.3
2017	6.2
2018	6.1
2019	6