Year	Ratio
1972-01-01	1.003540039062500
1973-01-01	0.982739984989166
1974-01-01	0.969099998474121
1975-01-01	0.979900002479553
1978-01-01	1.079300045967100
1979-01-01	1.089359998703000
1980-01-01	1.063019990921020
1981-01-01	1.055830001831050
1982-01-01	1.057680010795590
1983-01-01	1.082100033760070
1984-01-01	1.048089981079100
1985-01-01	1.055729985237120
1986-01-01	1.065639972686770
1987-01-01	1.064579963684080
1988-01-01	1.082030057907100
1989-01-01	1.108299970626830
1990-01-01	1.125679969787600
1991-01-01	1.148049950599670
1992-01-01	1.164029955863950
1993-01-01	1.136929988861080
1994-01-01	1.113270044326780
1995-01-01	1.120630025863650
1996-01-01	1.039960026741030
1997-01-01	1.101079940795900
1999-01-01	1.044829964637760
2000-01-01	1.028810024261470
2001-01-01	1.035290002822880
2002-01-01	0.980459988117218
2003-01-01	0.975459992885590
2004-01-01	1.012629985809330
2005-01-01	1.016720056533810
2006-01-01	1.024760007858280
2007-01-01	1.012899994850160
2008-01-01	1.009610056877140
2009-01-01	1.010120034217830
2010-01-01	1.006569981575010
2011-01-01	1.008659958839420
2012-01-01	1.023419976234440
2013-01-01	1.011299967765810
2014-01-01	1.025429964065550
2015-01-01	1.036499977111820