Year	Cases per 100,000
1990	15.08
1991	15.54
1992	16.02
1993	16.52
1994	17.03
1995	17.55
1996	18.04
1997	18.55
1998	19.06
1999	19.6
2000	20.15
2001	20.83
2002	21.54
2003	22.28
2004	23.04
2005	23.84
2006	24.6
2007	25.39
2008	26.21
2009	27.05
2010	27.93
2011	28.47
2012	29.02
2013	29.59
2014	30.17
2015	30.76
2016	31.36