Year	Cases per 100,000
1990	6.03
1991	5.76
1992	5.51
1993	5.27
1994	5.04
1995	4.83
1996	4.79
1997	4.75
1998	4.72
1999	4.68
2000	4.65
2001	4.68
2002	4.71
2003	4.74
2004	4.77
2005	4.8
2006	4.9
2007	4.99
2008	5.09
2009	5.19
2010	5.29
2011	5.34
2012	5.39
2013	5.45
2014	5.5
2015	5.56
2016	5.62