Year	Cases per 100,000
1990	6.18
1991	6.22
1992	6.25
1993	6.28
1994	6.31
1995	6.35
1996	6.41
1997	6.47
1998	6.53
1999	6.6
2000	6.66
2001	6.66
2002	6.65
2003	6.65
2004	6.64
2005	6.64
2006	6.62
2007	6.61
2008	6.59
2009	6.57
2010	6.56
2011	6.62
2012	6.68
2013	6.74
2014	6.8
2015	6.86
2016	6.93