Year	Cases per 100,000
1990	3.98
1991	4.15
1992	4.33
1993	4.51
1994	4.71
1995	4.91
1996	5.17
1997	5.44
1998	5.73
1999	6.04
2000	6.37
2001	6.53
2002	6.69
2003	6.86
2004	7.04
2005	7.22
2006	7.35
2007	7.48
2008	7.62
2009	7.76
2010	7.9
2011	8.01
2012	8.12
2013	8.24
2014	8.35
2015	8.47
2016	8.59