Year	Ratio
1999-01-01	0.989419996738434
2000-01-01	0.990379989147186
2001-01-01	0.997479975223541
2002-01-01	0.994430005550385
2003-01-01	1.000319957733150
2004-01-01	1.001090049743650
2005-01-01	1.005249977111820
2006-01-01	0.999549984931946
2007-01-01	0.998709976673126
2008-01-01	0.998440027236938
2009-01-01	0.989740014076233
2010-01-01	0.994949996471405
2011-01-01	1.000360012054440
2012-01-01	0.999939978122711
2013-01-01	1.000929951667790
2014-01-01	1.004480004310610
2015-01-01	0.997749984264374
2016-01-01	0.997990012168884