Year	Cases per 100,000
1990	15.9
1991	16.9
1992	17.98
1993	19.15
1994	20.4
1995	21.77
1996	22.47
1997	23.21
1998	23.98
1999	24.78
2000	25.61
2001	26.22
2002	26.85
2003	27.5
2004	28.16
2005	28.86
2006	29.13
2007	29.41
2008	29.7
2009	29.99
2010	30.29
2011	30.42
2012	30.55
2013	30.69
2014	30.82
2015	30.96
2016	31.11