Year	per 100,000 population
2000	16.9
2001	16.6
2002	16.3
2003	15.8
2004	15.6
2005	15.9
2006	16.3
2007	16.7
2008	17.1
2009	17
2010	17.2
2011	17.4
2012	17.6
2013	17
2014	16.1
2015	15.6
2016	15.3
2017	15.2
2018	15.5
2019	15.6