Year Percent 1960-01-01 -0.0389741990030651 1961-01-01 -2.6824703680742300 1962-01-01 0.0961538463947580 1963-01-01 1.5690041625892900 1964-01-01 1.7575662040575400 1965-01-01 0.4569746729170880 1966-01-01 -1.1873554359337800 1967-01-01 1.4669163547238000 1968-01-01 2.5376807134879600 1969-01-01 -0.1949902500381720 1970-01-01 2.8178539220851200 1971-01-01 0.4458086676924600 1972-01-01 1.5352153667887900 1973-01-01 6.3919742031182900 1974-01-01 16.8990368422354000 1975-01-01 19.0884996543863000 1976-01-01 7.0346896319882600 1977-01-01 11.8202775391489000 1978-01-01 13.2751232921383000 1979-01-01 14.0560247361062000 1980-01-01 17.3669682564025000 1981-01-01 14.7971516299733000 1982-01-01 11.7288868654679000 1983-01-01 13.3143177303524000 1984-01-01 11.5071695057308000 1985-01-01 22.3283750554416000 1986-01-01 31.9350161472763000 1987-01-01 24.8645003373125000 1988-01-01 19.7611617858857000 1989-01-01 17.6340799385345000 1990-01-01 23.9991651130861000 1991-01-01 14.4026748806266000 1992-01-01 11.2144813801986000 1993-01-01 18.5066883302714000 1994-01-01 10.5858066526451000 1995-01-01 10.0296564501018000 1996-01-01 9.7889204017996600 1997-01-01 4.4901362785520200 1998-01-01 2.5470597755415200 1999-01-01 0.5148271301929770 2000-01-01 2.2712875682872200 2001-01-01 3.7508205747202000 2002-01-01 1.8655250361007700 2003-01-01 2.1203909173333300 2004-01-01 4.4519439239504200 2005-01-01 4.6909487090377000 2006-01-01 4.0371235942961100 2007-01-01 4.5780857237715300 2008-01-01 6.7079229351593900 2009-01-01 1.0559502973120100 2010-01-01 0.9078069370523120 2011-01-01 5.1289237668161600 2012-01-01 1.7295779948876400 2013-01-01 0.7925093147977680 2014-01-01 1.1057751131775500 2015-01-01 -0.7306336696567910 2016-01-01 0.6040490869966820 2017-01-01 1.0123540331557300