Year	Cases per 100,000
1990	3.72
1991	3.8
1992	3.89
1993	3.98
1994	4.08
1995	4.18
1996	4.19
1997	4.21
1998	4.23
1999	4.25
2000	4.28
2001	4.33
2002	4.39
2003	4.45
2004	4.5
2005	4.57
2006	4.49
2007	4.42
2008	4.35
2009	4.29
2010	4.22
2011	4.26
2012	4.3
2013	4.34
2014	4.38
2015	4.42
2016	4.47