Year	Cases per 100,000
1990	2.04
1991	2.45
1992	2.94
1993	3.53
1994	4.25
1995	5.11
1996	5.63
1997	6.19
1998	6.82
1999	7.52
2000	8.29
2001	7.65
2002	7.06
2003	6.51
2004	6.01
2005	5.55
2006	5.85
2007	6.16
2008	6.5
2009	6.85
2010	7.23
2011	7.19
2012	7.16
2013	7.13
2014	7.1
2015	7.07
2016	7.04