Year	Cases per 100,000
1990	40.55
1991	41.34
1992	42.16
1993	42.82
1994	42.9
1995	42.81
1996	41.94
1997	41.58
1998	41.47
1999	41
2000	40.81
2001	40.8
2002	40.82
2003	40.45
2004	40.34
2005	40.02
2006	39.78
2007	38.75
2008	37.7
2009	36.68
2010	36.26
2011	35.62
2012	35.03
2013	35.11
2014	34.94
2015	34.61
2016	34.39