Quarter	Percent, Seasonally Adjusted
1999-01-01	82.0822331195775
1999-04-01	83.9464252027919
1999-07-01	83.0786644029428
1999-10-01	83.6835131554041
2000-01-01	83.8855421686747
2000-04-01	83.9188239623740
2000-07-01	81.3601177276164
2000-10-01	81.5819114471246
2001-01-01	83.8141626077182
2001-04-01	83.7657702789419
2001-07-01	83.9696484048287
2001-10-01	84.2479865143285
2002-01-01	81.9045878267227
2002-04-01	82.5959780621572
2002-07-01	81.7001828153565
2002-10-01	80.8444525680863
2003-01-01	80.1328856551635
2003-04-01	81.5751801981606
2003-07-01	80.5431481150616
2003-10-01	80.1322136859032
2004-01-01	78.5401903776609
2004-04-01	78.1825559998386
2004-07-01	77.3945017616349
2004-10-01	77.3951622298459
2005-01-01	78.2784802898023
2005-04-01	75.9596631675993
2005-07-01	76.7569854770164
2005-10-01	75.5498255213370
2006-01-01	76.6650214958747
2006-04-01	75.6108683714493
2006-07-01	74.6119994798290
2006-10-01	74.6292362149228
2007-01-01	73.9152431958136
2007-04-01	71.6336750045060
2007-07-01	73.0895043077379
2007-10-01	71.4539125610582
2008-01-01	72.0769956541205
2008-04-01	74.5012162953931
2008-07-01	69.6806836844438
2008-10-01	72.2679108599386
2009-01-01	72.6527666176879
2009-04-01	70.0259139990934
2009-07-01	70.0237573240884
2009-10-01	70.1929620993374
2010-01-01	68.5860654329285
2010-04-01	70.3439210634413
2010-07-01	68.3017426276250
2010-10-01	69.3110148242339
2011-01-01	68.4597044289560
2011-04-01	65.0121573538964
2011-07-01	66.7411219158724
2011-10-01	67.8588287961590
2012-01-01	66.9834503273760
2012-04-01	63.9091715764541
2012-07-01	63.8784310877092
2012-10-01	65.5866884516074
2013-01-01	63.2593937444795
2013-04-01	63.6853962569538
2013-07-01	60.1098139158971
2013-10-01	61.6222583609514
2014-01-01	63.5873092006992
2014-04-01	60.3385966729561
2014-07-01	60.3240324464974
2014-10-01	59.9176167939855
2015-01-01	59.9199471711462
2015-04-01	58.7116707356130
2015-07-01	58.8181483889715
2015-10-01	57.7650297463847
2016-01-01	58.4093875348111
2016-04-01	57.5260777838149
2016-07-01	57.4848066102920
2016-10-01	55.5089092590132
2017-01-01	55.6622601098685
2017-04-01	54.1091216364808
2017-07-01	52.7770906900096
2017-10-01	54.3860238071650
2018-01-01	54.3731383639983
2018-04-01	53.3715776106207