Year	Cases per 100,000
1990	35.86
1991	35.09
1992	34.08
1993	33.57
1994	32.65
1995	31.84
1996	31.06
1997	30.02
1998	29.4
1999	28.39
2000	27.56
2001	26.6
2002	25.89
2003	25.54
2004	24.18
2005	23.82
2006	23.46
2007	23.2
2008	23.03
2009	23.03
2010	22.73
2011	22.59
2012	22.32
2013	21.78
2014	21.86
2015	21.98
2016	22.15