Year Percent 1969-01-01 176.11800000000000 1970-01-01 192.07500000000000 1971-01-01 169.36100000000000 1972-01-01 129.48700000000000 1973-01-01 163.59900000000000 1974-01-01 170.39900000000000 1975-01-01 140.51600000000000 1976-01-01 123.04200000000000 1977-01-01 110.19100000000000 1978-01-01 109.90200000000000 1979-01-01 105.31700000000001 1980-01-01 104.08500000000000 1981-01-01 104.05900000000000 1982-01-01 100.26799999999999 1983-01-01 93.76870000000000 1984-01-01 89.58940000000000 1985-01-01 90.86330000000000 1986-01-01 94.51899999999999 1987-01-01 95.87090000000000 1988-01-01 95.64060000000000 1989-01-01 95.72510000000000 1990-01-01 97.95100000000001 1991-01-01 97.93430000000000 1992-01-01 95.77680000000000 1993-01-01 94.22360000000000 1994-01-01 95.37440000000000 1995-01-01 98.56260000000000 1996-01-01 101.67399999999999 1997-01-01 104.88700000000000 1998-01-01 103.41100000000000 1999-01-01 101.61200000000001 2000-01-01 104.32400000000000 2001-01-01 107.65400000000000 2002-01-01 109.28200000000001 2003-01-01 108.01799999999999 2004-01-01 104.91100000000000 2005-01-01 105.33900000000000 2006-01-01 111.46100000000000 2007-01-01 115.49900000000000 2008-01-01 114.98200000000001 2009-01-01 114.23299999999999 2010-01-01 112.01600000000000 2011-01-01 109.82500000000000 2012-01-01 109.61800000000000 2013-01-01 108.43600000000000 2014-01-01 106.52000000000000 2015-01-01 105.68000000000000 2016-01-01 99.28220000000000