Quarter	Percent, Seasonally Adjusted
1999-01-01	52.7360943813046
1999-04-01	52.9300471475366
1999-07-01	53.0607357320015
1999-10-01	53.1313605536280
2000-01-01	53.1042011498152
2000-04-01	53.2939605174037
2000-07-01	53.4030454067497
2000-10-01	53.6959910842660
2001-01-01	53.0794760735703
2001-04-01	52.7437888627196
2001-07-01	52.7937146608992
2001-10-01	52.5557009795754
2002-01-01	52.7595041078875
2002-04-01	52.8772291963986
2002-07-01	52.9894263431192
2002-10-01	53.1878466504831
2003-01-01	53.4643119887604
2003-04-01	53.8517650930005
2003-07-01	53.9108308419679
2003-10-01	53.9748853911566
2004-01-01	53.9102044637072
2004-04-01	53.6643712835230
2004-07-01	53.6376940232151
2004-10-01	53.9280534628722
2005-01-01	54.1922791171686
2005-04-01	54.3336500518531
2005-07-01	54.5856478195350
2005-10-01	54.6267479935873
2006-01-01	54.9286790370825
2006-04-01	55.0567317419016
2006-07-01	54.9713096917625
2006-10-01	55.1586214717546
2007-01-01	54.9210811027317
2007-04-01	54.7355727015026
2007-07-01	54.6097854515205
2007-10-01	54.5461371381025
2008-01-01	54.2149485489204
2008-04-01	54.1163283010955
2008-07-01	54.4819629138835
2008-10-01	54.3368201174422
2009-01-01	54.2134241825619
2009-04-01	54.2828619195868
2009-07-01	54.1400957405612
2009-10-01	54.4304505503548
2010-01-01	54.7447755638832
2010-04-01	54.8290579554420
2010-07-01	54.8922109812233
2010-10-01	54.8731618865813
2011-01-01	54.9168384986032
2011-04-01	55.1659285029764
2011-07-01	55.3081613809275
2011-10-01	55.5427180134691
2012-01-01	55.8092403188514
2012-04-01	56.2372625835049
2012-07-01	56.5513161684813
2012-10-01	56.6786378556990
2013-01-01	56.2922332269191
2013-04-01	56.8756908827646
2013-07-01	57.1262029092796
2013-10-01	57.5100118814924
2014-01-01	58.3495128385412
2014-04-01	58.5144064266037
2014-07-01	58.8488989425171
2014-10-01	59.0203443926934
2015-01-01	59.4898537281108
2015-04-01	59.8218231553300
2015-07-01	60.1407280520120
2015-10-01	60.3139787833063
2016-01-01	60.6823916034330
2016-04-01	60.9447774949189
2016-07-01	61.1901406308086
2016-10-01	61.5356775629074
2017-01-01	61.4654114710888
2017-04-01	61.8220505169105
2017-07-01	61.9522392861011
2017-10-01	62.1035038233278
2018-01-01	62.3548315323112
2018-04-01	62.3895205402764