Year	Cases per 100,000
1990	44.9
1991	44.9
1992	44.91
1993	44.93
1994	44.95
1995	44.97
1996	44.31
1997	43.66
1998	43.03
1999	42.4
2000	41.79
2001	41.22
2002	40.67
2003	40.13
2004	39.6
2005	39.08
2006	38.6
2007	38.14
2008	37.68
2009	37.24
2010	36.8
2011	36.81
2012	36.83
2013	36.86
2014	36.88
2015	36.91
2016	36.94