Quarter	Percent, Seasonally Adjusted
1999-01-01	14.97797488853560
1999-04-01	15.79548532652540
1999-07-01	16.94833215824120
1999-10-01	17.67731662403750
2000-01-01	18.41491149829620
2000-04-01	18.85177305097350
2000-07-01	18.97992100273660
2000-10-01	18.75993851946700
2001-01-01	19.33438379089350
2001-04-01	19.28212509070300
2001-07-01	19.40280945789680
2001-10-01	19.22164719029630
2002-01-01	19.01546032451250
2002-04-01	18.79556694289710
2002-07-01	18.62970497948050
2002-10-01	18.25234796544490
2003-01-01	17.83516092374980
2003-04-01	17.19774890803770
2003-07-01	17.48301319651040
2003-10-01	17.71558391511360
2004-01-01	18.74288748517780
2004-04-01	18.63158719554790
2004-07-01	18.00350832777850
2004-10-01	17.53690460183130
2005-01-01	17.15430840690610
2005-04-01	16.42891034286850
2005-07-01	15.96934701090440
2005-10-01	15.48272361523310
2006-01-01	14.66525055915580
2006-04-01	13.63470223451860
2006-07-01	12.97329922548840
2006-10-01	12.21910253975800
2007-01-01	11.52178673352110
2007-04-01	11.25986715435610
2007-07-01	11.27121158145190
2007-10-01	10.54132722596570
2008-01-01	10.39672086512850
2008-04-01	10.09203892853210
2008-07-01	8.86958864108235
2008-10-01	8.69113687098941
2009-01-01	10.28606385571150
2009-04-01	11.38972219889940
2009-07-01	12.59933129868310
2009-10-01	13.83221056595770
2010-01-01	14.85013439509240
2010-04-01	14.47395850964580
2010-07-01	14.31023333709030
2010-10-01	13.91012534095880
2011-01-01	13.76837467753720
2011-04-01	13.31417686626760
2011-07-01	13.43552577607490
2011-10-01	13.96339726185910
2012-01-01	13.87189062420910
2012-04-01	13.74433758989380
2012-07-01	13.94482791180930
2012-10-01	14.30576701210140
2013-01-01	14.30228377526000
2013-04-01	14.19435582779970
2013-07-01	14.28067796991940
2013-10-01	14.12662165394690
2014-01-01	13.83601321602500
2014-04-01	13.34733064158020
2014-07-01	13.00982397332890
2014-10-01	12.55954068738500
2015-01-01	12.20909464444660
2015-04-01	11.44824984175080
2015-07-01	11.33935126021660
2015-10-01	10.95296855178530
2016-01-01	10.23143266696160
2016-04-01	9.81176516278881
2016-07-01	9.52285920828381
2016-10-01	9.12617073131517
2017-01-01	8.57589244788700
2017-04-01	8.23202017957971
2017-07-01	7.95358374640555
2017-10-01	7.77272545784687
2018-01-01	7.03538510531532
2018-04-01	6.73982961716623