Year	Percent
1970	95.86288
1971	96.16279
1972	96.56751
1973	96.95946
1974	97.33925
1975	97.70742
1976	98.06452
1977	98.30508
1978	98.64301
1979	98.97119
1980	99.28934
1981	99.5996
1982	99.90119
1983	100.29268
1984	100.57803
1985	100.76118
1986	101.03383
1987	101.30112
1988	101.65441
1989	101.90909
1990	102.06835
1991	102.31317
1992	102.55507
1993	102.79232
1994	102.93863
1995	103.16781
1996	103.30789
1997	103.53238
1998	103.66667
1999	103.79851
2000	104.00982
2001	104.13625
2002	104.26045
2003	104.38247
2004	104.50237
2005	104.6202
2006	104.73602
2007	104.84615
2008	104.95805
2009	104.98866
2010	105.09745
2011	105.1263
2012	105.23213
2013	105.33626
2014	105.36232
2015	105.4637