Year	Ratio
2003-01-01	0.999689996242523
2004-01-01	0.997529983520508
2005-01-01	0.998480021953583
2006-01-01	0.989390015602112
2007-01-01	0.994180023670197
2008-01-01	0.993139982223511
2009-01-01	0.981069982051849
2010-01-01	0.985270023345947
2011-01-01	1.005419969558720
2012-01-01	1.009610056877140
2015-01-01	0.986800014972687
2016-01-01	0.971159994602203