Year	Cases per 100,000
1990	1.78
1991	1.77
1992	1.76
1993	1.74
1994	1.73
1995	1.72
1996	1.72
1997	1.73
1998	1.73
1999	1.74
2000	1.75
2001	1.85
2002	1.96
2003	2.08
2004	2.21
2005	2.34
2006	2.42
2007	2.51
2008	2.59
2009	2.69
2010	2.78
2011	2.81
2012	2.83
2013	2.86
2014	2.88
2015	2.91
2016	2.94