Year	Ratio
1971-01-01	0.320910006761551
1972-01-01	0.344579994678497
1980-01-01	0.562290012836456
1981-01-01	0.556840002536774
1982-01-01	0.584290027618408
1983-01-01	0.575640022754669
1985-01-01	0.604870021343231
1992-01-01	0.911419987678528
1996-01-01	1.022580027580260
1999-01-01	1.064210057258610
2000-01-01	1.127889990806580
2001-01-01	1.141499996185300
2002-01-01	1.159620046615600
2003-01-01	1.175590038299560
2004-01-01	1.061939954757690
2005-01-01	1.050799965858460
2006-01-01	1.036350011825560
2007-01-01	1.067720055580140
2008-01-01	1.092579960823060
2009-01-01	1.044929981231690
2010-01-01	1.040060043334960
2011-01-01	1.002560019493100
2012-01-01	1.075209975242610
2013-01-01	1.087360024452210
2014-01-01	1.157189965248110