Year	Cases per 100,000
1990	7.38
1991	7.23
1992	7.07
1993	6.92
1994	6.78
1995	6.64
1996	6.6
1997	6.56
1998	6.52
1999	6.48
2000	6.45
2001	6.39
2002	6.33
2003	6.27
2004	6.22
2005	6.17
2006	6.28
2007	6.39
2008	6.51
2009	6.63
2010	6.76
2011	6.97
2012	7.19
2013	7.42
2014	7.66
2015	7.91
2016	8.17