Year	Cases per 100,000
1990	9.06
1991	9.02
1992	8.99
1993	8.96
1994	8.92
1995	8.89
1996	8.83
1997	8.77
1998	8.71
1999	8.66
2000	8.61
2001	8.62
2002	8.64
2003	8.66
2004	8.68
2005	8.7
2006	8.86
2007	9.02
2008	9.2
2009	9.37
2010	9.56
2011	9.58
2012	9.61
2013	9.64
2014	9.67
2015	9.7
2016	9.73