Year	Cases per 100,000
2000	20
2001	17
2002	17
2003	23
2004	14
2005	17
2006	17
2007	16
2008	17
2009	15
2010	15
2011	14
2012	12
2013	11
2014	10
2015	8.6
2016	10
2017	9.4
2018	9.6
2019	8.7
2020	6.3