Quarter	Percent, Seasonally Adjusted
1999-01-01	37.4675972330622
1999-04-01	38.0981614367810
1999-07-01	38.6828774346798
1999-10-01	39.5825310049635
2000-01-01	40.4227079666461
2000-04-01	41.0912633017769
2000-07-01	41.5435478852118
2000-10-01	42.1300141127213
2001-01-01	42.7010974863957
2001-04-01	42.7034539873481
2001-07-01	43.3343210034954
2001-10-01	43.6503032073840
2002-01-01	44.4224494913991
2002-04-01	44.9068157887878
2002-07-01	45.2800276497551
2002-10-01	45.7296984490348
2003-01-01	46.0092827370579
2003-04-01	46.6380941711790
2003-07-01	47.2760898917380
2003-10-01	47.7738624978458
2004-01-01	48.1380366454099
2004-04-01	48.3569058673071
2004-07-01	49.1046190523218
2004-10-01	49.6921672143944
2005-01-01	50.6047005264216
2005-04-01	51.7301689905068
2005-07-01	52.1682027751822
2005-10-01	52.6123152979944
2006-01-01	53.1357011217160
2006-04-01	53.6409750134054
2006-07-01	53.7927622057041
2006-10-01	54.4524468870192
2007-01-01	54.8759692686895
2007-04-01	55.1647262605046
2007-07-01	55.4089472815846
2007-10-01	55.5681705074568
2008-01-01	55.6228548900197
2008-04-01	55.5678248288283
2008-07-01	55.4439558923606
2008-10-01	54.9079726735552
2009-01-01	53.7169409888293
2009-04-01	53.1624057997705
2009-07-01	53.2351094069649
2009-10-01	52.9145103536105
2010-01-01	53.0437276347099
2010-04-01	52.4826630793677
2010-07-01	52.6955135038321
2010-10-01	52.8838630178272
2011-01-01	52.6777435216566
2011-04-01	53.1882380244008
2011-07-01	52.5027566027333
2011-10-01	51.8758409309075
2012-01-01	51.8068929603572
2012-04-01	51.3916583168818
2012-07-01	50.9804884944971
2012-10-01	50.4333927036104
2013-01-01	50.3363057203008
2013-04-01	50.0782538176908
2013-07-01	50.3788220013749
2013-10-01	50.4859289764526
2014-01-01	50.8635019860097
2014-04-01	51.1129938290747
2014-07-01	51.0815060232329
2014-10-01	51.9014394160027
2015-01-01	51.9876892300331
2015-04-01	52.5237202962441
2015-07-01	52.8310180602532
2015-10-01	53.4043528481107
2016-01-01	53.7507072000877
2016-04-01	54.0380752410883
2016-07-01	54.6384268120805
2016-10-01	54.8157684207261
2017-01-01	55.1333638232775
2017-04-01	55.4713454298541
2017-07-01	55.9128835788316
2017-10-01	56.1164624200916
2018-01-01	56.2434910324361
2018-04-01	56.8280952098408
2018-07-01	57.0639648373969