Year	Percent
1970	107.75401
1971	108.37696
1972	108.95141
1973	109.25
1974	109.77995
1975	110.52632
1976	110.74766
1977	111.44165
1978	111.63311
1979	112.25383
1980	112.63383
1981	113.20755
1982	113.55236
1983	113.85542
1984	114.56693
1985	114.83622
1986	115.28302
1987	115.71165
1988	116.12319
1989	116.51865
1990	117.07317
1991	117.40614
1992	117.92295
1993	118.2266
1994	118.51852
1995	118.79937
1996	119.25466
1997	119.69466
1998	119.94003
1999	120.32401
2000	120.54993
2001	120.76814
2002	121.11888
2003	121.3205
2004	121.48649
2005	121.80851
2006	121.83007
2007	121.97943
2008	122.12389
2009	122.26368
2010	122.27662
2011	122.40964
2012	122.53855
2013	122.40373
2014	122.52874
2015	122.39819