Year	Percent
1970	103.71429
1971	104.06732
1972	104.26997
1973	104.60081
1974	105.05992
1975	105.36649
1976	105.53411
1977	105.82278
1978	106.10212
1979	106.37255
1980	106.51387
1981	106.64294
1982	106.7757
1983	107.01956
1984	107.14286
1985	107.26257
1986	107.37885
1987	107.5
1988	107.60986
1989	107.61099
1990	107.6121
1991	107.724
1992	107.62195
1993	107.73092
1994	107.63132
1995	107.63957
1996	107.54352
1997	107.44986
1998	107.45987
1999	107.46269
2000	107.46544
2001	107.46812
2002	107.47075
2003	107.47331
2004	107.38137
2005	107.38488
2006	107.47423
2007	107.47664
2008	107.47271
2009	107.47508
2010	107.55957
2011	107.56098
2012	107.56235
2013	107.64331
2014	107.64381
2015	107.64431