Year	per 100,000 population
2000	30.3
2001	30.2
2002	29.3
2003	29.8
2004	29.7
2005	29.9
2006	33.1
2007	33.4
2008	33
2009	33
2010	33.2
2011	33
2012	33.8
2013	33.8
2014	33.6
2015	34.4
2016	34.8
2017	34.9
2018	35.2
2019	35.5