Year	Cases per 100,000
2000	12
2001	13
2002	12
2003	10
2004	11
2005	10
2006	9.8
2007	8.9
2008	8.7
2009	8.5
2010	9.2
2011	8.7
2012	8.2
2013	8.1
2014	7.9
2015	8.2
2016	8.7
2017	8
2018	8
2019	7.8
2020	6.7