Year	per 100,000 population
2000	32
2001	30.9
2002	29.1
2003	29.7
2004	28.7
2005	26.8
2006	27.9
2007	22.9
2008	20.6
2009	22.5
2010	20.7
2011	21.6
2012	22
2013	22.2
2014	19.6
2015	21
2016	19
2017	20.9
2018	17.8
2019	19.8