Year	Cases per 100,000
1990	3.26
1991	3.3
1992	3.34
1993	3.38
1994	3.43
1995	3.47
1996	3.55
1997	3.62
1998	3.7
1999	3.78
2000	3.86
2001	3.91
2002	3.96
2003	4.02
2004	4.07
2005	4.13
2006	4.17
2007	4.22
2008	4.26
2009	4.31
2010	4.36
2011	4.39
2012	4.41
2013	4.44
2014	4.46
2015	4.49
2016	4.52