Year	Ratio
1996-01-01	0.798340022563934
1997-01-01	0.822350025177002
1998-01-01	0.825230002403259
1999-01-01	0.862929999828339
2000-01-01	0.897419989109039
2001-01-01	0.931469976902008
2002-01-01	0.951049983501434
2003-01-01	1.013560056686400
2004-01-01	1.014199972152710
2005-01-01	1.014829993247990
2006-01-01	1.154520034790040
2007-01-01	1.204710006713870
2008-01-01	1.213950037956240
2009-01-01	1.300989985466000
2010-01-01	1.335559964179990
2011-01-01	1.377850055694580
2012-01-01	1.412789940834050
2013-01-01	1.499850034713750
2014-01-01	1.553230047225950
2015-01-01	1.575479984283450
2016-01-01	1.592180013656620