Year	Cases per 100,000
1990	6.74
1991	6.73
1992	6.72
1993	6.71
1994	6.71
1995	6.71
1996	6.71
1997	6.72
1998	6.73
1999	6.74
2000	6.76
2001	6.76
2002	6.76
2003	6.77
2004	6.78
2005	6.79
2006	6.78
2007	6.77
2008	6.76
2009	6.75
2010	6.75
2011	6.74
2012	6.73
2013	6.72
2014	6.71
2015	6.71
2016	6.71