Year	Cases per 100,000
2000	31
2001	30
2002	28
2003	28
2004	26
2005	23
2006	21
2007	21
2008	18
2009	19
2010	17
2011	17
2012	15
2013	14
2014	19
2015	16
2016	18
2017	16
2018	16
2019	15
2020	15