Year	Cases per 100,000
1990	36.78
1991	36.6
1992	36.94
1993	37.38
1994	37.64
1995	37.98
1996	38.17
1997	37.75
1998	36.63
1999	35.47
2000	34.01
2001	32.66
2002	31.9
2003	30.76
2004	29.67
2005	28.57
2006	27.71
2007	26.94
2008	26.19
2009	25.47
2010	24.92
2011	24.18
2012	23.81
2013	23.71
2014	24.03
2015	24.43
2016	24.87