Year	Percent
1960-01-01	78.94110000000000
1961-01-01	79.63700000000000
1962-01-01	78.81210000000000
1963-01-01	80.65050000000000
1964-01-01	83.18690000000000
1965-01-01	84.27010000000000
1966-01-01	82.38100000000000
1967-01-01	79.86570000000000
1968-01-01	79.03590000000000
1969-01-01	79.13600000000001
1970-01-01	82.34430000000000
1971-01-01	81.27600000000001
1972-01-01	73.89820000000000
1973-01-01	74.73450000000000
1974-01-01	82.92250000000000
1975-01-01	88.78180000000000
1976-01-01	99.01200000000000
1977-01-01	108.90200000000000
1978-01-01	117.86800000000000
1979-01-01	126.54500000000000
1980-01-01	122.91100000000000
1981-01-01	116.40100000000001
1982-01-01	112.46500000000000
1983-01-01	111.31900000000000
1984-01-01	109.45500000000000
1985-01-01	105.16900000000000
1986-01-01	99.40899999999999
1987-01-01	95.71280000000000
1988-01-01	100.70600000000000
1989-01-01	107.92399999999999
1990-01-01	115.12700000000001
1991-01-01	120.27600000000001
1992-01-01	126.78500000000000
1993-01-01	135.83600000000000
1994-01-01	153.36100000000000
1995-01-01	172.78000000000000
1996-01-01	182.59400000000002
1997-01-01	182.69700000000000
1998-01-01	163.24500000000000
1999-01-01	136.55700000000002
2000-01-01	112.93000000000000
2001-01-01	95.72450000000000
2002-01-01	94.18450000000000
2003-01-01	94.68780000000000
2004-01-01	94.33690000000000
2005-01-01	98.11920000000000
2006-01-01	97.99360000000000
2007-01-01	98.19960000000000
2008-01-01	99.50700000000000
2009-01-01	97.88730000000000
2010-01-01	97.98660000000000
2011-01-01	102.24100000000000
2012-01-01	100.91799999999999
2013-01-01	97.83780000000000
2014-01-01	98.24490000000000
2015-01-01	98.52780000000000
2016-01-01	98.56880000000000