Year	Ratio
2003-01-01	0.861779987812042
2004-01-01	0.886250019073486
2006-01-01	0.873790025711060
2007-01-01	0.882589995861053
2008-01-01	0.874189972877502
2009-01-01	0.861949980258942
2010-01-01	0.850080013275146
2011-01-01	0.827579975128174
2012-01-01	0.849210023880005
2014-01-01	0.807780027389526
2015-01-01	0.778129994869232
2016-01-01	0.782270014286041