Quarter	Percent, Seasonally Adjusted
1999-04-01	55.1093746508125
1999-07-01	55.6703106825461
1999-10-01	56.1096600699822
2000-01-01	56.4927682737698
2000-04-01	56.9041980451730
2000-07-01	57.1212698092013
2000-10-01	57.2420754541264
2001-01-01	57.4195133753774
2001-04-01	57.4950727306555
2001-07-01	57.7556747936660
2001-10-01	57.6280739004147
2002-01-01	57.5301183316292
2002-04-01	57.4528868559796
2002-07-01	57.2375205737270
2002-10-01	57.2303938114806
2003-01-01	57.2276663961211
2003-04-01	57.3627991666234
2003-07-01	57.3216881518592
2003-10-01	57.5835346013296
2004-01-01	57.8028190081473
2004-04-01	57.7610966169601
2004-07-01	58.0579411595976
2004-10-01	58.4687950277057
2005-01-01	58.7577763648669
2005-04-01	59.1549043798012
2005-07-01	59.4989649903270
2005-10-01	59.6573775004772
2006-01-01	60.0697176255411
2006-04-01	60.2288811742687
2006-07-01	60.4980929091305
2006-10-01	60.7378314814599
2007-01-01	63.3934230109312
2007-04-01	63.3912408757118
2007-07-01	63.3077998698197
2007-10-01	63.1452822477562
2008-01-01	62.8026841287430
2008-04-01	62.0510387795460
2008-07-01	61.1521796494717
2008-10-01	59.9094734610801
2009-01-01	57.5174905067245
2009-04-01	56.4192333029382
2009-07-01	55.3611903674379
2009-10-01	54.7259108537995
2010-01-01	54.1777436531412
2010-04-01	53.6919393832200
2010-07-01	53.3465987417149
2010-10-01	52.8065434978759
2011-01-01	52.6700800603902
2011-04-01	52.6295890815184
2011-07-01	52.1811884952426
2011-10-01	52.3313103702693
2012-01-01	52.0907302011942
2012-04-01	51.9748908178968
2012-07-01	52.0942946022996
2012-10-01	52.2842254337072
2013-01-01	52.7595996813655
2013-04-01	53.3106763164713
2013-07-01	53.7558672165515
2013-10-01	53.9665008435638
2014-01-01	54.0991432600409
2014-04-01	54.1313371309592
2014-07-01	54.5346458867630
2014-10-01	54.9514370185574
2015-01-01	55.2662277214785
2015-04-01	55.5909761951051
2015-07-01	55.8442801910198
2015-10-01	56.1153043693692
2016-01-01	56.4472653328949
2016-04-01	56.9471344470970
2016-07-01	57.2546719928898
2016-10-01	57.3442865301954
2017-01-01	57.5832324682827
2017-04-01	57.6462629183888
2017-07-01	57.8241448967206
2017-10-01	58.2649337240032
2018-01-01	58.4324740150385
2018-04-01	58.6149243567188