Year	Cases per 100,000
1990	1.64
1991	1.67
1992	1.71
1993	1.75
1994	1.79
1995	1.83
1996	1.83
1997	1.83
1998	1.83
1999	1.83
2000	1.83
2001	1.84
2002	1.85
2003	1.86
2004	1.87
2005	1.88
2006	1.92
2007	1.96
2008	2
2009	2.05
2010	2.1
2011	2.11
2012	2.12
2013	2.13
2014	2.14
2015	2.16
2016	2.17