Year	Percent
1960-01-01	162.44299999999998
1961-01-01	167.95300000000000
1962-01-01	165.90000000000000
1963-01-01	169.93200000000002
1964-01-01	196.51000000000000
1965-01-01	211.04100000000000
1966-01-01	212.65700000000000
1967-01-01	207.51700000000000
1968-01-01	185.24700000000000
1969-01-01	175.25500000000000
1970-01-01	165.23200000000000
1971-01-01	161.37400000000000
1972-01-01	181.23200000000000
1973-01-01	195.94600000000000
1974-01-01	169.74700000000000
1975-01-01	170.91299999999998
1976-01-01	190.47900000000000
1977-01-01	200.43700000000000
1978-01-01	191.62500000000000
1979-01-01	175.67200000000000
1980-01-01	157.46900000000000
1981-01-01	150.14100000000000
1982-01-01	167.88000000000000
1983-01-01	214.29300000000000
1984-01-01	229.77599999999998
1985-01-01	202.55900000000003
1986-01-01	250.15700000000000
1987-01-01	224.64300000000000
1988-01-01	129.83100000000002
1989-01-01	128.07399999999998
1990-01-01	125.97300000000000
1991-01-01	122.21500000000000
1992-01-01	117.16200000000000
1993-01-01	107.00600000000000
1994-01-01	91.25620000000000
1995-01-01	101.17299999999999
1996-01-01	111.21700000000001
1997-01-01	104.53600000000000
1998-01-01	107.05300000000000
1999-01-01	131.62900000000000
2000-01-01	87.74280000000000
2001-01-01	70.05260000000000
2002-01-01	63.98370000000000
2003-01-01	46.84180000000000
2004-01-01	48.55790000000000
2005-01-01	38.79480000000000
2006-01-01	28.15720000000000
2007-01-01	22.20020000000000
2008-01-01	25.38570000000000
2009-01-01	32.15110000000000
2010-01-01	35.21630000000000
2011-01-01	34.45760000000000
2012-01-01	37.65400000000000
2013-01-01	45.12010000000000
2014-01-01	51.26420000000000
2015-01-01	60.43110000000000