Year	Cases per 100,000
1990	55.88
1991	54.41
1992	53.08
1993	51.76
1994	50.22
1995	49.28
1996	47.87
1997	47.37
1998	46.51
1999	45.39
2000	43.96
2001	42.57
2002	41.51
2003	40.36
2004	39.22
2005	38.24
2006	37.34
2007	36.57
2008	36.01
2009	35.47
2010	34.99
2011	34.48
2012	33.95
2013	33.45
2014	33
2015	32.58
2016	32.23