Year	Cases per 100,000
1990	4.02
1991	4.04
1992	4.05
1993	4.07
1994	4.09
1995	4.11
1996	4.12
1997	4.14
1998	4.16
1999	4.18
2000	4.2
2001	4.24
2002	4.28
2003	4.33
2004	4.38
2005	4.44
2006	4.46
2007	4.47
2008	4.49
2009	4.51
2010	4.53
2011	4.6
2012	4.67
2013	4.74
2014	4.82
2015	4.9
2016	4.98