Year	Cases per 100,000
1990	3.85
1991	3.97
1992	4.1
1993	4.24
1994	4.38
1995	4.53
1996	4.59
1997	4.66
1998	4.73
1999	4.8
2000	4.87
2001	5.06
2002	5.25
2003	5.45
2004	5.66
2005	5.88
2006	6.16
2007	6.45
2008	6.76
2009	7.08
2010	7.43
2011	7.69
2012	7.97
2013	8.26
2014	8.56
2015	8.87
2016	9.19