Year	Ratio
1990-01-01	1.064849972724910
1991-01-01	1.063019990921020
1992-01-01	1.071740031242370
1993-01-01	1.072270035743710
1994-01-01	1.020580053329470
1995-01-01	1.011350035667420
1996-01-01	1.005370020866390
1997-01-01	1.006410002708440
1998-01-01	1.012789964675900
1999-01-01	0.996990025043488
2000-01-01	1.003990054130550
2001-01-01	0.994009971618652
2002-01-01	0.995150029659271
2003-01-01	0.999710023403168
2004-01-01	1.000130057334900
2005-01-01	0.999379992485046
2006-01-01	0.999329984188080
2007-01-01	0.996850013732910
2008-01-01	0.997409999370575
2009-01-01	1.000100016593930
2010-01-01	1.005470037460330
2011-01-01	1.005560040473940
2012-01-01	1.004809975624080
2013-01-01	1.002889990806580
2014-01-01	1.000869989395140
2015-01-01	1.001819968223570
2016-01-01	1.002550005912780
2017-01-01	1.016510009765630