Year	Cases per 100,000
1990	2.68
1991	2.77
1992	2.87
1993	2.98
1994	3.09
1995	3.2
1996	3.41
1997	3.63
1998	3.87
1999	4.12
2000	4.4
2001	4.46
2002	4.53
2003	4.6
2004	4.67
2005	4.75
2006	4.84
2007	4.92
2008	5.02
2009	5.11
2010	5.21
2011	5.22
2012	5.24
2013	5.26
2014	5.28
2015	5.3
2016	5.32