Year	per 100,000 population
2000	28.4
2001	28.5
2002	28.7
2003	28.2
2004	28
2005	28.9
2006	28.1
2007	27.6
2008	27.6
2009	27.9
2010	28.2
2011	28.1
2012	27.4
2013	27
2014	27
2015	27.3
2016	27.5
2017	27
2018	26.9
2019	26.8