Year	Cases per 100,000
2000	11
2001	9.2
2002	7.5
2003	7.3
2004	6.6
2005	7.3
2006	6.3
2007	6.5
2008	6
2009	5.3
2010	6
2011	6.4
2012	6.1
2013	5.9
2014	5.2
2015	5.6
2016	5.1
2017	4.4
2018	4.7
2019	4.5
2020	3.6