Year	Cases per 100,000
1990	28.28
1991	28.38
1992	28.66
1993	28.83
1994	29.07
1995	29.24
1996	29.31
1997	29.31
1998	29.18
1999	29.11
2000	28.85
2001	28.41
2002	27.97
2003	27.68
2004	27.32
2005	26.81
2006	26.1
2007	25.5
2008	24.83
2009	24.15
2010	23.55
2011	23.06
2012	22.58
2013	22.34
2014	22.06
2015	21.91
2016	21.74