Year	per 100,000 population
2000	13.5
2001	14.8
2002	15
2003	15.1
2004	13.8
2005	17.2
2006	18.5
2007	19.1
2008	19.9
2009	23
2010	24.5
2011	24.7
2012	22.3
2013	22.1
2014	24
2015	23.5
2016	21.2
2017	21.3
2018	20.7
2019	20.1