Year Percent 1960-01-01 72.60030000000000 1961-01-01 75.12920000000000 1962-01-01 85.13820000000000 1963-01-01 92.21740000000000 1964-01-01 93.29410000000000 1965-01-01 91.31680000000000 1966-01-01 89.71860000000000 1967-01-01 91.47030000000000 1968-01-01 92.34410000000000 1969-01-01 94.04290000000000 1970-01-01 90.34910000000000 1971-01-01 104.07700000000001 1972-01-01 108.84100000000001 1973-01-01 101.63400000000000 1974-01-01 93.69630000000000 1975-01-01 85.68260000000000 1976-01-01 80.84920000000000 1977-01-01 79.16240000000000 1978-01-01 72.55840000000000 1979-01-01 67.10480000000000 1980-01-01 60.20530000000000 1981-01-01 57.50130000000000 1982-01-01 57.25330000000000 1983-01-01 60.62220000000000 1984-01-01 64.81580000000000 1985-01-01 68.34930000000000 1986-01-01 71.39860000000000 1987-01-01 72.62440000000000 1988-01-01 73.34580000000000 1989-01-01 76.43170000000000 1990-01-01 80.79780000000000 1991-01-01 82.57180000000000 1992-01-01 85.46730000000000 1993-01-01 90.76310000000000 1994-01-01 95.91920000000000 1995-01-01 96.08710000000000 1996-01-01 103.42299999999999 1997-01-01 109.10500000000000 1998-01-01 113.77100000000000 1999-01-01 118.76899999999999 2000-01-01 117.70100000000001 2001-01-01 121.91300000000000 2002-01-01 127.78100000000000 2003-01-01 128.03799999999998 2004-01-01 128.39500000000000 2005-01-01 124.83100000000000 2006-01-01 114.59800000000000 2007-01-01 120.92200000000001 2008-01-01 127.61800000000000 2009-01-01 131.17700000000002 2010-01-01 124.94700000000000 2011-01-01 124.16400000000000 2012-01-01 122.87899999999999 2013-01-01 122.74700000000001 2014-01-01 132.78500000000000 2015-01-01 142.99300000000000 2016-01-01 145.80800000000000