Year	Cases per 100,000
1990	5.14
1991	5.1
1992	5.06
1993	5.03
1994	4.99
1995	4.96
1996	4.92
1997	4.89
1998	4.85
1999	4.82
2000	4.79
2001	4.77
2002	4.76
2003	4.75
2004	4.74
2005	4.73
2006	4.69
2007	4.65
2008	4.62
2009	4.59
2010	4.55
2011	4.55
2012	4.56
2013	4.56
2014	4.56
2015	4.57
2016	4.57