Year	Cases per 100,000
1983	1.165
1984	1.22
1985	1.325
1986	1.27
1987	1.415
1988	1.5
1989	1.695
1990	1.7
1991	1.75
1992	1.8
1993	1.86
1994	1.91
1995	1.97
1996	2.01
1997	2.06
1998	2.11
1999	2.16
2000	2.21
2001	2.27
2002	2.33
2003	2.39
2004	2.45
2005	2.51
2006	2.62
2007	2.73
2008	2.84
2009	2.96
2010	3.09
2011	3.1
2012	3.12
2013	3.13
2014	3.14
2015	3.16
2016	3.17