Year	Ratio
1989-01-01	1.002840042114260
1990-01-01	1.068930029869080
1991-01-01	0.997820019721985
1992-01-01	1.007539987564090
1993-01-01	1.007760047912600
1994-01-01	0.997889995574951
1995-01-01	0.971949994564056
1996-01-01	0.970979988574982
1997-01-01	0.970960021018982
1998-01-01	0.975669980049133
1999-01-01	0.975870013237000
2000-01-01	0.980830013751984
2001-01-01	0.984579980373383
2002-01-01	0.976159989833832
2003-01-01	0.964829981327057
2004-01-01	0.959420025348663
2005-01-01	0.956210017204285
2006-01-01	0.966719985008240
2007-01-01	0.959959983825684
2008-01-01	0.967400014400482
2009-01-01	0.984229981899261
2010-01-01	0.999979972839355
2011-01-01	0.999729990959167
2012-01-01	0.993589997291565
2013-01-01	0.991789996623993
2014-01-01	0.992550015449524
2015-01-01	0.991779983043671