Year Percent 1963-01-01 33.14240000000000 1964-01-01 36.18170000000000 1965-01-01 35.79550000000000 1966-01-01 35.39480000000000 1967-01-01 34.63910000000000 1968-01-01 34.72410000000000 1969-01-01 37.28930000000000 1970-01-01 40.60060000000000 1971-01-01 41.85910000000000 1972-01-01 43.09780000000000 1973-01-01 49.60970000000000 1974-01-01 52.29990000000000 1975-01-01 53.00120000000000 1976-01-01 54.04130000000000 1977-01-01 55.41280000000000 1978-01-01 56.13300000000000 1979-01-01 57.79710000000000 1980-01-01 61.24140000000000 1981-01-01 67.41420000000000 1982-01-01 73.37840000000000 1983-01-01 78.21500000000000 1984-01-01 82.47600000000000 1985-01-01 87.94350000000000 1986-01-01 85.59230000000000 1987-01-01 78.19080000000000 1988-01-01 72.58520000000000 1989-01-01 73.01620000000000 1990-01-01 74.01850000000000 1991-01-01 75.39580000000000 1992-01-01 77.35370000000000 1993-01-01 75.55500000000000 1994-01-01 75.95370000000000 1995-01-01 80.96590000000000 1996-01-01 87.37860000000000 1997-01-01 91.15060000000000 1998-01-01 103.67800000000000 1999-01-01 104.40799999999999 2000-01-01 93.64210000000000 2001-01-01 107.92700000000000 2002-01-01 107.57900000000000 2003-01-01 102.68700000000001 2004-01-01 94.94450000000000 2005-01-01 88.42530000000000 2006-01-01 82.54040000000000 2007-01-01 79.10430000000000 2008-01-01 93.26860000000000 2009-01-01 96.46690000000000 2010-01-01 90.87530000000000 2011-01-01 98.26860000000000 2012-01-01 108.79100000000000 2013-01-01 117.81400000000000 2014-01-01 126.75700000000000 2015-01-01 126.08500000000000 2016-01-01 129.18800000000000