Quarter	Percent
1999-01-01	48.7802346101941
1999-04-01	49.7874105568806
1999-07-01	49.7832817337461
1999-10-01	49.3294821539096
2000-01-01	48.9609053497942
2000-04-01	49.5723853683668
2000-07-01	51.3055098684210
2000-10-01	50.5039078568490
2001-01-01	50.6631027038141
2001-04-01	51.1156812339332
2001-07-01	52.3980692204991
2001-10-01	50.7487179487179
2002-01-01	51.4800778449247
2002-04-01	51.1832804015982
2002-07-01	50.3124039741883
2002-10-01	49.6408783090499
2003-01-01	49.4155045118950
2003-04-01	50.0512925728354
2003-07-01	50.0972463916470
2003-10-01	51.1960744224085
2004-01-01	51.4639639639640
2004-04-01	52.3327194597913
2004-07-01	53.7224782386073
2004-10-01	52.7097633439197
2005-01-01	52.1645686214308
2005-04-01	52.4408965305496
2005-07-01	53.1986531986532
2005-10-01	52.9129680644832
2006-01-01	52.6439123790117
2006-04-01	53.1023942944473
2006-07-01	54.0217060553809
2006-10-01	53.1494066335328
2007-01-01	53.1003039513678
2007-04-01	54.9240121580547
2007-07-01	55.4115164305095
2007-10-01	54.3462968545875
2008-01-01	52.9482310613632
2008-04-01	53.9476314211473
2008-07-01	55.1615133853601
2008-10-01	53.7093746912970
2009-01-01	51.3596971809941
2009-04-01	52.8538699073613
2009-07-01	53.4888317849377
2009-10-01	52.8859458390986
2010-01-01	51.5136574302337
2010-04-01	51.3361601419978
2010-07-01	52.0055188725732
2010-10-01	51.5423277816103
2011-01-01	49.6057559629411
2011-04-01	49.9605755962941
2011-07-01	50.2856017333071
2011-10-01	49.6060665747489
2012-01-01	48.7065997836137
2012-04-01	49.0508507917773
2012-07-01	49.4495773540397
2012-10-01	49.3512875958325
2013-01-01	47.5125110391522
2013-04-01	48.2582670984202
2013-07-01	49.4557222712562
2013-10-01	48.8477003040110
2014-01-01	47.6050543637967
2014-04-01	49.3192281320404
2014-07-01	49.4908948502056
2014-10-01	49.1286469551596
2015-01-01	48.1706124046175
2015-04-01	49.1782430052827
2015-07-01	50.1369059260708