Year	Cases per 100,000
1990	12.73
1991	13.19
1992	13.67
1993	14.18
1994	14.72
1995	15.3
1996	15.81
1997	16.35
1998	16.91
1999	17.51
2000	18.15
2001	18.71
2002	19.31
2003	19.93
2004	20.58
2005	21.26
2006	22.17
2007	23.12
2008	24.13
2009	25.18
2010	26.29
2011	27.04
2012	27.82
2013	28.63
2014	29.46
2015	30.32
2016	31.21