Year	Cases per 100,000
1990	2.83
1991	2.98
1992	3.14
1993	3.31
1994	3.5
1995	3.69
1996	3.88
1997	4.08
1998	4.3
1999	4.52
2000	4.77
2001	4.97
2002	5.19
2003	5.42
2004	5.66
2005	5.92
2006	6.13
2007	6.35
2008	6.59
2009	6.83
2010	7.09
2011	7.25
2012	7.42
2013	7.59
2014	7.78
2015	7.96
2016	8.16