Year	Cases per 100,000
1990	16.84
1991	16.87
1992	16.9
1993	16.94
1994	16.98
1995	17.03
1996	16.85
1997	16.68
1998	16.51
1999	16.35
2000	16.2
2001	16.7
2002	17.23
2003	17.78
2004	18.36
2005	18.97
2006	19.56
2007	20.18
2008	20.82
2009	21.5
2010	22.2
2011	22.23
2012	22.27
2013	22.31
2014	22.35
2015	22.39
2016	22.44