Year	Ratio
1977-01-01	1.324800014495850
1979-01-01	1.632830023765560
1983-01-01	0.951489984989166
1984-01-01	1.863360047340390
1986-01-01	1.085180044174190
1987-01-01	1.086279988288880
1992-01-01	1.351619958877560
1993-01-01	1.392089962959290
1994-01-01	1.420500040054320
1998-01-01	1.797610044479370
1999-01-01	1.823529958724980
2000-01-01	1.673660039901730
2001-01-01	1.536540031433110
2002-01-01	1.613720059394840
2003-01-01	1.789100050926210
2004-01-01	1.940140008926390
2005-01-01	1.990820050239560
2006-01-01	1.940680027008060
2007-01-01	1.858199954032900
2008-01-01	1.997499942779540
2009-01-01	1.786100029945370
2010-01-01	1.869240045547490
2011-01-01	1.764660000801090
2012-01-01	1.753620028495790
2013-01-01	1.825379967689510
2014-01-01	1.687780022621150
2015-01-01	1.645130038261410
2016-01-01	1.604480028152470