Year	per 100,000 population
2000	9.2
2001	9.2
2002	8.6
2003	9
2004	9.3
2005	8.4
2006	8.1
2007	7.6
2008	7.8
2009	7.5
2010	7.8
2011	7.9
2012	7.7
2013	7.7
2014	7.9
2015	8
2016	8
2017	8.3
2018	8.2
2019	8.1