Year	per 100,000 population
2000	11.4
2001	11.1
2002	10
2003	8.7
2004	9.6
2005	9.9
2006	8.9
2007	8
2008	6.5
2009	6
2010	4.8
2011	4.2
2012	3.6
2013	4.2
2014	4.3
2015	3.6
2016	4.1
2017	3.4
2018	3
2019	3.1