Year Percent 1960-01-01 48.69890000000000 1961-01-01 47.16880000000000 1962-01-01 59.29130000000000 1963-01-01 72.62260000000000 1964-01-01 80.62260000000000 1965-01-01 69.82630000000000 1966-01-01 63.52200000000000 1967-01-01 74.40140000000000 1968-01-01 80.96720000000000 1969-01-01 89.08240000000000 1970-01-01 90.44750000000000 1971-01-01 109.14000000000000 1972-01-01 121.82300000000000 1973-01-01 115.04600000000000 1974-01-01 112.09000000000000 1975-01-01 110.81600000000000 1976-01-01 117.86100000000000 1977-01-01 124.31700000000001 1978-01-01 127.97000000000000 1979-01-01 136.95500000000000 1980-01-01 145.24900000000000 1981-01-01 146.29100000000000 1982-01-01 151.05300000000000 1983-01-01 153.74400000000000 1984-01-01 145.56000000000000 1985-01-01 140.91800000000000 1986-01-01 125.28299999999999 1987-01-01 123.36600000000000 1988-01-01 125.12200000000001 1989-01-01 125.19400000000000 1990-01-01 128.47100000000000 1991-01-01 112.18100000000000 1992-01-01 106.13600000000001 1993-01-01 104.73200000000001 1994-01-01 104.30500000000000 1995-01-01 106.08000000000000 1996-01-01 106.47700000000000 1997-01-01 107.21200000000000 1998-01-01 107.44500000000000 1999-01-01 110.35200000000000 2000-01-01 113.32700000000001 2001-01-01 141.14800000000000 2002-01-01 178.38700000000000 2003-01-01 152.77600000000000 2004-01-01 121.88500000000000 2005-01-01 105.54700000000001 2006-01-01 98.62400000000000 2007-01-01 98.12750000000000 2008-01-01 105.34600000000000 2009-01-01 107.63300000000000 2010-01-01 106.35799999999999 2011-01-01 107.04400000000000 2012-01-01 104.02400000000000 2013-01-01 102.30400000000000 2014-01-01 109.78399999999999 2015-01-01 116.18900000000000 2016-01-01 116.95700000000001