Year	Cases per 100,000
1990	15.89
1991	15.95
1992	16.05
1993	16.08
1994	16.18
1995	15.78
1996	16.77
1997	17.98
1998	19.29
1999	20.12
2000	21.3
2001	21.44
2002	21.65
2003	22.17
2004	22.96
2005	23.64
2006	24.66
2007	25.47
2008	26.05
2009	26.89
2010	27.84
2011	27.77
2012	27.72
2013	27.69
2014	27.68
2015	27.69
2016	27.69