Year	Cases per 100,000
1990	22.63
1991	22.96
1992	23.64
1993	23.96
1994	24.57
1995	24.84
1996	24.84
1997	25.4
1998	26.15
1999	26.98
2000	27.79
2001	27.79
2002	28.04
2003	28.93
2004	30.11
2005	31.03
2006	30.68
2007	30.06
2008	30.16
2009	29.65
2010	29.09
2011	29.06
2012	28.93
2013	28.82
2014	28.66
2015	28.85
2016	29.07