Year	Cases per 100,000
1990	4.26
1991	4.24
1992	4.22
1993	4.2
1994	4.18
1995	4.17
1996	4.16
1997	4.16
1998	4.16
1999	4.15
2000	4.15
2001	4.29
2002	4.43
2003	4.57
2004	4.72
2005	4.87
2006	4.83
2007	4.78
2008	4.73
2009	4.68
2010	4.64
2011	4.64
2012	4.65
2013	4.65
2014	4.66
2015	4.67
2016	4.68