Year	Cases per 100,000
1990	3.41
1991	3.5
1992	3.59
1993	3.69
1994	3.79
1995	3.89
1996	4.05
1997	4.22
1998	4.4
1999	4.59
2000	4.78
2001	4.99
2002	5.22
2003	5.45
2004	5.7
2005	5.95
2006	6.3
2007	6.67
2008	7.07
2009	7.49
2010	7.94
2011	8.18
2012	8.42
2013	8.68
2014	8.94
2015	9.22
2016	9.51