Year	Cases per 100,000
2000	15
2001	13
2002	13
2003	12
2004	11
2005	11
2006	10
2007	9.8
2009	7.9
2010	7.9
2011	8
2012	7.3
2013	7.3
2014	6.5
2015	6.5
2016	7.1
2017	6.4
2018	5.3
2019	5.2
2020	4.2