Year	per 100,000 population
2000	22
2001	22.3
2002	21.7
2003	23.1
2004	23.7
2005	24
2006	23.7
2007	23.6
2008	23.8
2009	23.6
2010	23.4
2011	22.7
2012	21.7
2013	21
2014	20
2015	20
2016	20.1
2017	19.2
2018	18.6
2019	17.9