Year	Cases per 100,000
1990	12.18
1991	12.81
1992	13.68
1993	14.46
1994	15.14
1995	15.76
1996	15.8
1997	16.24
1998	16.74
1999	17.55
2000	18.28
2001	18.74
2002	19.21
2003	19.75
2004	19.99
2005	20.52
2006	21.3
2007	21.82
2008	22.19
2009	22.66
2010	23.06
2011	22.96
2012	22.9
2013	22.54
2014	21.91
2015	21.77
2016	21.75