Year	Percent
1960-01-01	13.321600000000000
1961-01-01	13.564900000000000
1962-01-01	12.856900000000000
1963-01-01	11.657600000000000
1964-01-01	11.069800000000000
1965-01-01	10.855600000000000
1966-01-01	11.117700000000000
1967-01-01	10.841700000000000
1968-01-01	10.682000000000000
1969-01-01	10.808200000000000
1970-01-01	11.001500000000000
1971-01-01	10.588700000000000
1972-01-01	9.676580000000000
1973-01-01	11.145200000000000
1974-01-01	14.198300000000000
1975-01-01	14.420600000000000
1976-01-01	13.849600000000000
1977-01-01	15.931100000000000
1978-01-01	16.706400000000000
1979-01-01	17.575600000000000
1980-01-01	17.341700000000000
1981-01-01	17.986900000000000
1982-01-01	18.870100000000000
1983-01-01	18.807000000000002
1984-01-01	18.740600000000000
1985-01-01	20.182200000000000
1986-01-01	23.331500000000000
1987-01-01	28.399400000000000
1988-01-01	50.778200000000000
1989-01-01	72.810000000000000
1990-01-01	73.763500000000000
1991-01-01	74.718000000000000
1992-01-01	80.461900000000000
1993-01-01	84.243300000000000
1994-01-01	84.260300000000000
1995-01-01	88.715800000000000
1996-01-01	93.923300000000000
1997-01-01	98.914500000000000
1998-01-01	104.118000000000000
1999-01-01	109.516000000000000
2000-01-01	111.704000000000000
2001-01-01	111.699000000000000
2002-01-01	107.285000000000000
2003-01-01	107.922000000000010
2004-01-01	113.057999999999990
2005-01-01	119.450000000000000
2006-01-01	129.537999999999980
2007-01-01	138.204000000000000
2008-01-01	142.080000000000000
2009-01-01	145.742000000000020
2010-01-01	145.806000000000000