Year Percent 1980-01-01 17.73665480468120000 1981-01-01 10.47636319668900000 1982-01-01 5.92722298201992000 1983-01-01 2.29153537034707000 1984-01-01 2.71490470548818000 1985-01-01 2.61954629955700000 1986-01-01 -0.00668553372425532 1987-01-01 0.96301264865156500 1988-01-01 0.23252503399780000 1989-01-01 5.16996495562574000 1990-01-01 4.01098407755617000 1991-01-01 4.32373944355423000 1992-01-01 2.85844672514456000 1993-01-01 1.79486146433781000 1994-01-01 1.44226958804943000 1995-01-01 2.95680025092621000 1996-01-01 2.08657385169123000 1997-01-01 8.90518339116016000 1998-01-01 3.44635865955271000 1999-01-01 3.36303630363043000 2000-01-01 2.14885532743700000 2001-01-01 2.30344748349254000 2002-01-01 2.04109102620208000 2003-01-01 2.23543664374553000 2004-01-01 2.31455462238091000 2005-01-01 3.37781903988239000 2006-01-01 8.46798033243282000 2007-01-01 4.51302643925590000 2008-01-01 5.33810413462120000 2009-01-01 2.03430619880539000 2010-01-01 0.50550031017916300 2011-01-01 5.83516519570853000 2012-01-01 0.81608928156240300 2013-01-01 1.10698554000140000 2014-01-01 0.24786539236482400 2015-01-01 -2.30187563045606000 2016-01-01 -0.69014237582870600 2017-01-01 0.58471760797343400