Year	Cases per 100,000
1990	1.63
1991	1.66
1992	1.7
1993	1.74
1994	1.78
1995	1.83
1996	1.85
1997	1.88
1998	1.91
1999	1.94
2000	1.97
2001	1.96
2002	1.95
2003	1.93
2004	1.92
2005	1.91
2006	1.89
2007	1.88
2008	1.87
2009	1.85
2010	1.84
2011	1.83
2012	1.82
2013	1.81
2014	1.8
2015	1.8
2016	1.79