Year	per 100,000 population
2000	17.7
2001	16
2002	16.7
2003	13.6
2004	13.9
2005	14.7
2006	19.3
2007	17
2008	12.4
2009	8.8
2010	6.8
2011	8.1
2012	6.8
2013	7.1
2014	6.1
2015	6.4
2016	6.1
2017	4.1
2018	5.7
2019	4.5