Year	Cases per 100,000
1990	26.68
1991	26.86
1992	27.19
1993	27.6
1994	28.11
1995	29.22
1996	30.09
1997	30.73
1998	30.54
1999	29.9
2000	28.86
2001	28.13
2002	27.68
2003	27.32
2004	27.03
2005	26.65
2006	26.14
2007	25.44
2008	24.89
2009	24.84
2010	24.79
2011	24.26
2012	23.64
2013	23
2014	22.26
2015	21.98
2016	21.76