Year	Percent
1970	89.84199
1971	90.50773
1972	90.92873
1973	91.35021
1974	91.94215
1975	92.52525
1976	92.88538
1977	93.4236
1978	93.76181
1979	94.25926
1980	94.74638
1981	95.21277
1982	95.65972
1983	96.08844
1984	96.66667
1985	97.22222
1986	97.6
1987	97.96238
1988	98.46154
1989	98.94419
1990	99.40828
1991	99.85486
1992	100.2849
1993	100.55866
1994	101.09739
1995	101.48248
1996	101.8543
1997	102.34681
1998	102.69231
1999	103.02648
2000	103.34988
2001	103.663
2002	104.08654
2003	104.25532
2004	104.54016
2005	104.93119
2006	105.07901
2007	105.4505
2008	105.69551
2009	105.93952
2010	106.17021
2011	106.40084
2012	106.61841
2013	106.82977
2014	107.04225
2015	107.24206