Year Percent 1975-01-01 0.0554940000000000100 1976-01-01 0.0554940000000000100 1977-01-01 0.0554940000000000100 1978-01-01 0.0554940000000000100 1979-01-01 0.0554940000000000100 1980-01-01 0.0554940000000000100 1981-01-01 0.0554940000000000100 1982-01-01 0.0781299999999999900 1983-01-01 0.0781299999999999900 1984-01-01 0.0781299999999999900 1985-01-01 -0.0484529999999999960 1986-01-01 -0.0484529999999999960 1987-01-01 -0.0222650000000000000 1988-01-01 0.1793740000000000000 1989-01-01 0.1793740000000000000 1990-01-01 0.2079450000000000000 1991-01-01 0.0265760000000000000 1992-01-01 0.2391540000000000000 1993-01-01 -0.0552799999999999960 1994-01-01 0.1205260000000000000 1995-01-01 0.1895780000000000000 1996-01-01 1.1785000000000000000 1997-01-01 0.8884980000000000000 1998-01-01 -0.2440380000000000000 1999-01-01 -0.9204150000000000000 2000-01-01 -0.2896950000000000000 2001-01-01 -0.1785380000000000000 2002-01-01 0.0240009999999999980 2003-01-01 -0.0280040000000000000 2004-01-01 0.0018280000000000002 2005-01-01 0.4340090000000000300 2006-01-01 0.6131370000000000000 2007-01-01 -0.1119100000000000000 2008-01-01 -0.0554070000000000050 2009-01-01 0.5225370000000000000 2010-01-01 0.1779910000000000000 2011-01-01 0.1959750000000000000 2012-01-01 0.1834680000000000200 2013-01-01 0.0164380000000000000 2014-01-01 -0.0079700000000000000 2015-01-01 0.4084730000000000000 2016-01-01 0.2608720000000000000