Year	Cases per 100,000
1990	11.58
1991	11.67
1992	11.76
1993	11.86
1994	11.96
1995	12.06
1996	12.05
1997	12.04
1998	12.03
1999	12.02
2000	12.02
2001	11.87
2002	11.73
2003	11.59
2004	11.45
2005	11.32
2006	11.43
2007	11.54
2008	11.66
2009	11.77
2010	11.89
2011	11.85
2012	11.8
2013	11.76
2014	11.72
2015	11.68
2016	11.64