Year	Cases per 100,000
2000	11
2001	10
2002	12
2003	12
2004	12
2005	14
2006	14
2007	13
2008	13
2009	13
2010	12
2011	13
2012	13
2013	11
2014	10
2015	8.9
2016	8.7
2017	7.9
2018	7.1
2019	7.1
2020	6.2