Year	per 100,000 population
2000	16.3
2001	16.2
2002	15.4
2003	17
2004	16.3
2005	15.8
2006	14.5
2007	14.1
2008	14.2
2009	15
2010	15
2011	16.1
2012	16.7
2013	15.7
2014	14.8
2015	13.6
2016	13
2017	13.9
2018	13.6
2019	12.2