Year	Cases per 100,000
1990	2.44
1991	2.47
1992	2.5
1993	2.53
1994	2.57
1995	2.6
1996	2.63
1997	2.65
1998	2.68
1999	2.71
2000	2.74
2001	2.74
2002	2.74
2003	2.74
2004	2.74
2005	2.74
2006	2.73
2007	2.71
2008	2.7
2009	2.68
2010	2.67
2011	2.67
2012	2.68
2013	2.68
2014	2.68
2015	2.68
2016	2.69