Year	Cases per 100,000
2000	43
2001	28
2002	29
2003	17
2004	26
2005	20
2006	21
2007	19
2008	20
2009	22
2010	19
2011	20
2012	15
2014	11
2015	21
2016	14
2017	12
2018	13
2019	8.1
2020	15