Year	Cases per 100,000
1990	8.84
1991	8.86
1992	8.89
1993	8.93
1994	8.96
1995	8.99
1996	8.99
1997	8.98
1998	8.98
1999	8.98
2000	8.98
2001	8.93
2002	8.89
2003	8.84
2004	8.8
2005	8.76
2006	8.69
2007	8.62
2008	8.56
2009	8.5
2010	8.43
2011	8.41
2012	8.39
2013	8.37
2014	8.35
2015	8.33
2016	8.32