Year	Cases per 100,000
1990	52.4
1991	49.64
1992	47.25
1993	44.87
1994	42.48
1995	40.18
1996	39.93
1997	40.07
1998	40.59
1999	40.38
2000	40.18
2001	39.79
2002	39.71
2003	39.66
2004	38.92
2005	38.42
2006	37.18
2007	36.82
2008	35.6
2009	35.65
2010	35.53
2011	36.06
2012	36.14
2013	35.91
2014	36.03
2015	35.86
2016	35.65