Year	per 100,000 population
2000	24.3
2001	24.1
2002	22
2003	21.7
2004	21.2
2005	19.9
2006	21
2007	19.7
2008	20.6
2009	20.4
2010	18.6
2011	17.9
2012	17
2013	17.2
2014	15.4
2015	14
2016	15.2
2017	15.9
2018	16.2
2019	15.3