Year	per 100,000 population
2000	5.1
2001	4.8
2002	4.8
2003	4.8
2004	4.8
2005	4.7
2006	4.8
2007	4.9
2008	4.8
2009	4.8
2010	4.9
2011	5
2012	5
2013	4.9
2014	4.9
2015	4.5
2016	4.5
2017	4.5
2018	4.4
2019	4.5