Year Percent 1975-01-01 84.30240000000000 1976-01-01 81.60190000000000 1977-01-01 88.83210000000000 1978-01-01 100.02500000000000 1979-01-01 100.80000000000000 1980-01-01 107.36300000000000 1981-01-01 112.03900000000000 1982-01-01 107.49400000000000 1983-01-01 100.75500000000000 1984-01-01 97.11430000000000 1985-01-01 90.93920000000000 1986-01-01 79.17260000000000 1987-01-01 73.59190000000000 1988-01-01 74.51690000000000 1989-01-01 80.10100000000000 1990-01-01 83.26770000000000 1991-01-01 82.42399999999999 1992-01-01 84.52560000000000 1993-01-01 91.83830000000000 1994-01-01 96.57350000000000 1995-01-01 96.13880000000000 1996-01-01 99.34720000000000 1997-01-01 104.95100000000001 1998-01-01 105.23500000000000 1999-01-01 104.63400000000000 2000-01-01 105.77100000000000 2001-01-01 105.14800000000000 2002-01-01 104.37400000000000 2003-01-01 97.02000000000000 2004-01-01 91.55100000000000 2005-01-01 93.90920000000000 2006-01-01 98.40090000000000 2007-01-01 111.56100000000000 2008-01-01 124.39500000000000 2009-01-01 126.29299999999999 2010-01-01 126.66100000000000 2011-01-01 127.26400000000000 2012-01-01 129.40400000000000 2013-01-01 129.63200000000000 2014-01-01 121.68200000000000 2015-01-01 108.10100000000000 2016-01-01 97.33130000000000