Year	Percent
1960-01-01	279.09100000000000
1961-01-01	301.69500000000000
1962-01-01	294.58500000000000
1963-01-01	258.20900000000000
1964-01-01	239.43300000000000
1965-01-01	235.83100000000000
1966-01-01	259.64099999999996
1967-01-01	285.14599999999996
1968-01-01	257.05400000000003
1969-01-01	282.66200000000003
1970-01-01	326.06700000000000
1971-01-01	270.29500000000000
1972-01-01	221.17400000000000
1973-01-01	215.47500000000000
1974-01-01	233.23800000000000
1975-01-01	233.97200000000000
1976-01-01	157.30700000000002
1977-01-01	137.38600000000000
1978-01-01	178.42200000000000
1979-01-01	184.85500000000000
1980-01-01	191.57600000000000
1981-01-01	187.06799999999998
1982-01-01	212.76400000000000
1983-01-01	238.88200000000000
1984-01-01	215.97500000000000
1985-01-01	192.00900000000001
1986-01-01	180.35900000000000
1987-01-01	168.96400000000003
1988-01-01	154.43700000000000
1989-01-01	142.34500000000000
1990-01-01	139.13500000000000
1991-01-01	148.52200000000002
1992-01-01	139.94400000000000
1993-01-01	124.71700000000001
1994-01-01	93.34250000000000
1995-01-01	86.72540000000000
1996-01-01	107.18500000000000
1997-01-01	104.38700000000000
1998-01-01	114.34200000000001
1999-01-01	112.29799999999999
2000-01-01	117.81299999999999
2001-01-01	132.47200000000000
2002-01-01	138.34799999999998
2003-01-01	153.48700000000000
2004-01-01	164.61900000000003
2005-01-01	145.63500000000000
2006-01-01	123.76299999999999
2007-01-01	104.53000000000000
2008-01-01	94.26799999999999
2009-01-01	86.14250000000000
2010-01-01	90.56800000000000
2011-01-01	102.12100000000001
2012-01-01	120.12899999999999
2013-01-01	130.28600000000000
2014-01-01	115.44200000000001
2015-01-01	102.90600000000000