Year	Percent
1971	106.70695
1972	110.90305
1973	104.76762
1974	106.5888
1975	94.30341
1976	75.49315
1977	92.15686
1978	90.04312
1979	99.45788
1980	105.29437
1981	118.48225
1982	105.09479
1983	101.25666
1984	92.82577
1985	107.68686
1986	109.25798
1987	113.55874
1988	100.57201
1989	103.79115
1990	101.42431
1991	98.17033
1992	102.3722
1993	103.22364
1994	105.33604
1995	103.59322
1996	101.25637
1997	104.27497
1998	101.79125
1999	104.23758
2000	106.16894
2001	105.84899
2002	106.10496
2003	103.78242
2004	100.3639
2005	96.36697
2006	99.14909
2007	95.97876
2008	100.19623
2009	93.45336
2010	97.3402
2011	96.88488
2012	95.11855
2013	98.46154
2014	98.21694
2015	98.69674
2016	100.79286