Year	Cases per 100,000
1990	3.37
1991	3.52
1992	3.68
1993	3.84
1994	4.01
1995	4.2
1996	4.43
1997	4.67
1998	4.94
1999	5.21
2000	5.51
2001	5.72
2002	5.94
2003	6.17
2004	6.41
2005	6.67
2006	6.99
2007	7.32
2008	7.68
2009	8.05
2010	8.46
2011	8.65
2012	8.86
2013	9.07
2014	9.28
2015	9.51
2016	9.74