Year	Cases per 100,000
1990	2.7
1991	2.99
1992	3.31
1993	3.66
1994	4.06
1995	4.5
1996	4.55
1997	4.6
1998	4.66
1999	4.73
2000	4.79
2001	4.72
2002	4.65
2003	4.59
2004	4.53
2005	4.47
2006	4.48
2007	4.49
2008	4.5
2009	4.51
2010	4.53
2011	4.55
2012	4.58
2013	4.61
2014	4.64
2015	4.67
2016	4.71