Year	Cases per 100,000
1990	4.49
1991	4.47
1992	4.47
1993	4.46
1994	4.46
1995	4.46
1996	4.43
1997	4.4
1998	4.38
1999	4.36
2000	4.34
2001	4.28
2002	4.23
2003	4.18
2004	4.13
2005	4.08
2006	4.02
2007	3.95
2008	3.89
2009	3.83
2010	3.78
2011	3.77
2012	3.76
2013	3.76
2014	3.75
2015	3.75
2016	3.74