Year	Cases per 100,000
1990	32.94
1991	33.12
1992	33.17
1993	33.44
1994	33.31
1995	33.21
1996	32.82
1997	32.27
1998	31.75
1999	30.46
2000	29.78
2001	29.19
2002	28.62
2003	27.96
2004	27.35
2005	27.13
2006	27.05
2007	26.73
2008	26.43
2009	26.09
2010	25.82
2011	25.25
2012	24.83
2013	24.41
2014	24.02
2015	23.53
2016	23.15