Year	Cases per 100,000
1990	44.7
1991	43.5
1992	41.96
1993	40.28
1994	38.55
1995	36.84
1996	36
1997	35.67
1998	34.83
1999	33.79
2000	32.7
2001	31.39
2002	30.41
2003	29.31
2004	28.33
2005	27.36
2006	26.27
2007	25.59
2008	24.99
2009	24.47
2010	23.9
2011	23.89
2012	23.56
2013	23.18
2014	22.88
2015	22.98
2016	23.17