Year	Cases per 100,000
2000	11
2001	8.3
2002	8
2003	7.5
2004	7
2005	6.9
2006	6.8
2007	6.8
2008	7.3
2009	6.3
2010	7.4
2011	7.2
2012	6.5
2013	6.7
2014	6.4
2015	6.2
2016	6
2017	6.3
2018	6.3
2019	5.6
2020	5.1