Year	per 100,000 population
2000	23.2
2001	23.3
2002	23.4
2003	22.9
2004	22.8
2005	22.6
2006	22.3
2007	22.2
2008	21.9
2009	22.3
2010	22.4
2011	25.3
2012	23.7
2013	23.9
2014	23.9
2015	24
2016	24.1
2017	21.5
2018	17.6
2019	17