Year	Ratio
1971-01-01	0.807780027389526
1972-01-01	1.069579958915710
1977-01-01	1.197819948196410
1978-01-01	1.186579942703250
1979-01-01	1.183930039405820
1980-01-01	1.199990034103390
1981-01-01	1.410099983215330
1982-01-01	1.470510005950930
1983-01-01	1.354390025138850
1984-01-01	1.169679999351500
1985-01-01	1.177569985389710
1986-01-01	1.178709983825680
1987-01-01	1.158529996871950
1988-01-01	1.056550025939940
1989-01-01	1.168239951133730
1990-01-01	1.113250017166140
1991-01-01	1.160099983215330
1992-01-01	1.204270005226140
1993-01-01	1.176290035247800
2002-01-01	1.148159980773930
2003-01-01	0.976429998874664
2004-01-01	1.076560020446780
2005-01-01	1.019330024719240
2007-01-01	0.972459971904755
2008-01-01	0.908789992332459
2009-01-01	1.000830054283140
2010-01-01	1.029590010643010
2013-01-01	0.978579998016357
2014-01-01	0.993189990520477
2015-01-01	0.996819972991943
2016-01-01	1.037350058555600