Year	Cases per 100,000
1990	50.43
1991	48.9
1992	48.28
1993	47.68
1994	47.85
1995	47.76
1996	46.23
1997	44.31
1998	42.27
1999	41.03
2000	39.65
2001	38.79
2002	37.86
2003	37.54
2004	38.19
2005	38.48
2006	38.01
2007	37.24
2008	35.36
2009	33.82
2010	32.63
2011	31.43
2012	30.1
2013	28.24
2014	26.5
2015	25.41
2016	25.56