Year	Cases per 100,000
2000	4.8
2001	4.5
2002	3.9
2003	4.4
2004	4.3
2005	3.3
2006	3.4
2007	3.8
2008	3.8
2009	5
2010	4.6
2011	3.7
2012	3.2
2013	3.4
2014	3
2015	3.6
2016	3.5
2017	4.1
2018	2.8
2019	2.5
2020	2.1