Year	Cases per 100,000
1990	3.21
1991	3.25
1992	3.29
1993	3.33
1994	3.37
1995	3.42
1996	3.54
1997	3.68
1998	3.82
1999	3.97
2000	4.12
2001	4.25
2002	4.39
2003	4.54
2004	4.69
2005	4.85
2006	5.03
2007	5.21
2008	5.4
2009	5.6
2010	5.81
2011	5.87
2012	5.94
2013	6.01
2014	6.08
2015	6.16
2016	6.24