Year	Cases per 100,000
1990	1.76
1991	1.81
1992	1.85
1993	1.89
1994	1.94
1995	1.99
1996	1.94
1997	1.89
1998	1.84
1999	1.79
2000	1.75
2001	1.79
2002	1.83
2003	1.88
2004	1.93
2005	1.98
2006	2.02
2007	2.05
2008	2.09
2009	2.13
2010	2.18
2011	2.19
2012	2.21
2013	2.23
2014	2.25
2015	2.27
2016	2.29