Year	per 100,000 population
2000	19
2001	18.9
2002	18.5
2003	18.4
2004	18.1
2005	17.8
2006	17.6
2007	17.5
2008	17.1
2009	17.1
2010	16.9
2011	14.9
2012	15.6
2013	15.4
2014	15.5
2015	15.8
2016	16.3
2017	15.6
2018	14.2
2019	13.5