Year	Cases per 100,000
1990	29.46
1991	29.86
1992	30.29
1993	30.73
1994	31.18
1995	31.67
1996	31.39
1997	31.15
1998	30.91
1999	30.68
2000	30.49
2001	29.64
2002	28.85
2003	28.09
2004	27.35
2005	26.66
2006	26.16
2007	25.64
2008	25.17
2009	24.7
2010	24.27
2011	24.09
2012	23.93
2013	23.78
2014	23.63
2015	23.48
2016	23.35