Year Percent 1990-01-01 0.7768050000000000 1991-01-01 0.8027820000000000 1992-01-01 0.8786860000000001 1993-01-01 1.0767600000000000 1994-01-01 1.1619899999999999 1995-01-01 1.2023600000000000 1996-01-01 1.2575500000000000 1997-01-01 1.1524000000000000 1998-01-01 0.9806299999999999 1999-01-01 0.9397800000000000 2000-01-01 0.9382500000000000 2001-01-01 1.0150900000000000 2002-01-01 1.0904100000000000 2003-01-01 1.1346100000000001 2004-01-01 1.1445200000000000 2005-01-01 1.0983399999999999 2006-01-01 1.1186700000000000 2007-01-01 1.0701600000000000 2008-01-01 1.0475700000000001 2009-01-01 1.1355100000000000 2010-01-01 1.1276899999999999 2011-01-01 1.1886500000000000 2012-01-01 1.2848200000000000 2013-01-01 1.3902100000000000 2014-01-01 1.3652400000000000 2015-01-01 1.3357400000000000 2016-01-01 1.2407900000000000