Year	Cases per 100,000
1990	3.64
1991	3.73
1992	3.83
1993	3.93
1994	4.03
1995	4.14
1996	4.17
1997	4.2
1998	4.23
1999	4.27
2000	4.3
2001	4.32
2002	4.33
2003	4.35
2004	4.36
2005	4.38
2006	4.38
2007	4.38
2008	4.38
2009	4.38
2010	4.38
2011	4.4
2012	4.41
2013	4.43
2014	4.44
2015	4.46
2016	4.47