Year	Cases per 100,000
1990	51.46
1991	50.93
1992	50.03
1993	49.15
1994	47.74
1995	45.83
1996	43.33
1997	41.55
1998	40.86
1999	40.6
2000	40.47
2001	40.17
2002	39.99
2003	39.86
2004	39.81
2005	39.79
2006	39.61
2007	39.28
2008	39
2009	38.62
2010	38.11
2011	37.57
2012	36.97
2013	36.33
2014	35.68
2015	35.13
2016	34.6