Year	Cases per 100,000
1990	8.3
1991	8.23
1992	8.16
1993	8.09
1994	8.03
1995	7.97
1996	7.9
1997	7.83
1998	7.76
1999	7.69
2000	7.63
2001	7.59
2002	7.55
2003	7.52
2004	7.48
2005	7.45
2006	7.44
2007	7.43
2008	7.42
2009	7.41
2010	7.41
2011	7.41
2012	7.41
2013	7.42
2014	7.42
2015	7.43
2016	7.44