Year	Cases per 100,000
2000	17
2001	16
2002	15
2003	15
2004	14
2005	15
2006	15
2007	16
2008	16
2009	15
2010	16
2011	14
2012	13
2013	11
2014	11
2015	10
2016	9
2017	8.7
2018	8.8
2019	8.6
2020	7