Year	Cases per 100,000
1990	52.25
1991	51.98
1992	51.47
1993	50.75
1994	50.5
1995	50.41
1996	50.09
1997	49.22
1998	48.44
1999	47.54
2000	46.5
2001	45.42
2002	44.94
2003	44.39
2004	43.43
2005	42.36
2006	41.89
2007	41.72
2008	41.13
2009	40.31
2010	39.29
2011	38.73
2012	38.22
2013	37.66
2014	37.06
2015	37.14
2016	37.09