Year	Percent
1960-01-01	95.805
1961-01-01	100.215
1962-01-01	97.355
1963-01-01	92.570
1964-01-01	96.620
1965-01-01	98.150
1966-01-01	94.970
1967-01-01	96.440
1968-01-01	94.200
1969-01-01	91.240
1970-01-01	92.830
1971-01-01	92.100
1972-01-01	87.835
1973-01-01	90.245
1974-01-01	93.340
1975-01-01	97.925
1976-01-01	94.695
1977-01-01	92.945
1978-01-01	99.285
1979-01-01	102.310
1980-01-01	101.925
1981-01-01	97.930
1982-01-01	92.770
1983-01-01	96.085
1984-01-01	94.645
1985-01-01	93.570
1986-01-01	94.035
1987-01-01	95.080
1988-01-01	97.640
1989-01-01	101.240
1990-01-01	102.705
1991-01-01	102.960
1992-01-01	105.570
1993-01-01	105.050
1994-01-01	94.640
1995-01-01	101.460
1996-01-01	106.600
1997-01-01	99.150
1998-01-01	102.350
1999-01-01	107.420
2000-01-01	115.180
2001-01-01	115.380
2002-01-01	117.040
2003-01-01	116.350
2004-01-01	119.120
2005-01-01	121.170
2006-01-01	126.510
2007-01-01	128.890
2008-01-01	122.960
2009-01-01	120.880
2010-01-01	123.400
2011-01-01	126.000
2012-01-01	125.570
2013-01-01	123.320
2014-01-01	116.240
2015-01-01	111.390