Year	Cases per 100,000
1990	15.85
1991	15.86
1992	15.87
1993	15.89
1994	15.91
1995	15.93
1996	15.92
1997	15.91
1998	15.9
1999	15.89
2000	15.9
2001	16.17
2002	16.45
2003	16.73
2004	17.02
2005	17.32
2006	17.64
2007	17.96
2008	18.3
2009	18.64
2010	18.99
2011	19.26
2012	19.54
2013	19.82
2014	20.1
2015	20.39
2016	20.69