Year	Cases per 100,000
1990	21.39
1991	21.76
1992	22.15
1993	22.56
1994	22.99
1995	23.44
1996	23.88
1997	24.35
1998	24.83
1999	25.33
2000	25.85
2001	26.1
2002	26.36
2003	26.62
2004	26.88
2005	27.16
2006	27.48
2007	27.79
2008	28.12
2009	28.46
2010	28.8
2011	29.03
2012	29.27
2013	29.51
2014	29.76
2015	30.01
2016	30.27