Year	Cases per 100,000
2000	31
2001	28
2002	26
2003	25
2004	23
2005	21
2006	20
2007	19
2008	19
2009	18
2010	18
2011	17
2012	16
2013	16
2014	15
2015	14
2016	14
2017	13
2018	12
2019	11
2020	10