Year	Cases per 100,000
1990	3.62
1991	3.79
1992	3.94
1993	4.11
1994	4.3
1995	4.51
1996	4.72
1997	4.94
1998	5.18
1999	5.45
2000	5.8
2001	6.13
2002	6.5
2003	6.91
2004	7.23
2005	7.59
2006	7.75
2007	7.9
2008	8
2009	8.13
2010	8.28
2011	8.35
2012	8.34
2013	8.37
2014	8.41
2015	8.45
2016	8.51