Year	Cases per 100,000
1990	37.1
1991	38.6
1992	40.17
1993	41.81
1994	43.53
1995	45.34
1996	45.17
1997	45.03
1998	44.89
1999	44.77
2000	44.66
2001	44.1
2002	43.57
2003	43.04
2004	42.53
2005	42.03
2006	40.99
2007	39.97
2008	38.98
2009	38.03
2010	37.1
2011	36.91
2012	36.73
2013	36.54
2014	36.36
2015	36.19
2016	36.02