Year	per 100,000 population
2000	14.8
2001	14.1
2002	14
2003	13.2
2004	12.6
2005	13.2
2006	13.1
2007	12.6
2008	12.3
2009	11.9
2010	11.4
2011	11.3
2012	10.9
2013	10.5
2014	10.5
2015	9.9
2016	8.6
2017	8.3
2018	8
2019	7.4