Year	per 100,000 population
2000	23.9
2001	23.2
2002	23.8
2003	25.6
2004	24.1
2005	24.3
2006	23.9
2007	25
2008	24.4
2009	24.9
2010	24.1
2011	23.4
2012	21.6
2013	21.4
2014	20.1
2015	19.1
2016	17.5
2017	17
2018	16.7
2019	15.3