Year	Cases per 100,000
1990	4.82
1991	4.87
1992	4.93
1993	4.99
1994	5.05
1995	5.11
1996	5.21
1997	5.32
1998	5.43
1999	5.55
2000	5.67
2001	5.79
2002	5.93
2003	6.07
2004	6.21
2005	6.36
2006	6.36
2007	6.37
2008	6.37
2009	6.38
2010	6.39
2011	6.53
2012	6.68
2013	6.83
2014	6.98
2015	7.14
2016	7.31