Year Index 1960-01-01 9.847620000000000 1961-01-01 9.502200000000000 1962-01-01 11.725800000000000 1963-01-01 13.966400000000000 1964-01-01 8.075220000000000 1965-01-01 6.565519999999999 1966-01-01 8.353730000000000 1967-01-01 11.051100000000000 1968-01-01 9.273760000000001 1969-01-01 9.157880000000000 1970-01-01 12.515900000000000 1971-01-01 13.172800000000000 1972-01-01 9.780000000000000 1973-01-01 10.813500000000000 1974-01-01 17.336300000000000 1975-01-01 20.968800000000000 1976-01-01 14.891600000000000 1977-01-01 10.451800000000000 1978-01-01 10.232900000000000 1979-01-01 12.058400000000000 1980-01-01 13.686300000000000 1981-01-01 15.400800000000000 1982-01-01 15.139600000000000 1983-01-01 17.456200000000000 1984-01-01 13.697600000000000 1985-01-01 11.911300000000000 1986-01-01 12.110300000000000 1987-01-01 17.980500000000000 1988-01-01 30.814500000000000 1989-01-01 18.039400000000000 1990-01-01 14.158400000000000 1991-01-01 16.071600000000000 1992-01-01 12.995700000000000 1993-01-01 9.947110000000000 1994-01-01 9.037939999999999 1995-01-01 9.044960000000001 1996-01-01 9.921180000000000 1997-01-01 13.426800000000000 1998-01-01 18.309400000000000 1999-01-01 20.896200000000000 2000-01-01 20.436100000000000 2001-01-01 22.088200000000000 2002-01-01 22.412900000000000 2003-01-01 24.684000000000000 2004-01-01 15.340400000000000 2005-01-01 11.024900000000000 2006-01-01 10.445100000000000 2007-01-01 11.525100000000000 2008-01-01 21.429300000000000 2009-01-01 39.591000000000000 2010-01-01 26.337000000000000 2011-01-01 18.596800000000000 2012-01-01 21.040000000000000 2013-01-01 13.887100000000000 2014-01-01 11.290000000000000 2015-01-01 12.565200000000000 2016-01-01 15.722900000000000 2017-01-01 11.021200000000000