Year	per 100,000 population
2000	29.1
2001	30.3
2002	29.3
2003	26.3
2004	26.5
2005	22.6
2006	20.9
2007	21.4
2008	19.4
2009	23.3
2010	18.8
2011	18.2
2012	21.1
2013	18.9
2014	19.5
2015	15.9
2016	15.7
2017	18.7
2018	15.3
2019	14.9