Year	Cases per 100,000
1983	52.13
1984	56.51
1985	56.12
1986	58.46
1987	61.13
1988	66.29
1989	65.23
1990	68.7
1991	69.61
1992	70.54
1993	71.5
1994	72.49
1995	73.52
1996	72.89
1997	72.3
1998	71.74
1999	71.22
2000	70.72
2001	69.82
2002	68.95
2003	68.11
2004	67.29
2005	66.51
2006	65.53
2007	64.57
2008	63.64
2009	62.72
2010	61.84
2011	62.24
2012	62.66
2013	63.08
2014	63.5
2015	63.93
2016	64.37