Year	Cases per 100,000
1990	39.76
1991	37.8
1992	36.08
1993	35.69
1994	35.1
1995	34.29
1996	32.82
1997	31.16
1998	29.87
1999	28.45
2000	27.26
2001	26.3
2002	25.09
2003	24.31
2004	23.73
2005	23.03
2006	22.32
2007	21.53
2008	20.76
2009	20.54
2010	20.07
2011	19.55
2012	19.32
2013	18.89
2014	18.33
2015	18.09
2016	17.93