Year	Cases per 100,000
1990	36.68
1991	37.84
1992	39.05
1993	40.31
1994	41.62
1995	42.98
1996	42.52
1997	42.09
1998	41.66
1999	41.25
2000	40.85
2001	41.34
2002	41.84
2003	42.35
2004	42.86
2005	43.4
2006	44.2
2007	45.02
2008	45.86
2009	46.73
2010	47.62
2011	48.11
2012	48.62
2013	49.14
2014	49.66
2015	50.19
2016	50.73
