Year	Cases per 100,000
1990	5.15
1991	5.01
1992	4.87
1993	4.73
1994	4.6
1995	4.47
1996	4.34
1997	4.22
1998	4.1
1999	3.99
2000	3.88
2001	3.94
2002	4.01
2003	4.07
2004	4.14
2005	4.22
2006	4.19
2007	4.17
2008	4.15
2009	4.12
2010	4.1
2011	4.14
2012	4.17
2013	4.21
2014	4.25
2015	4.29
2016	4.33