Quarter	Percent, Seasonally Adjusted
1999-01-01	39.2264645939735
1999-04-01	38.7526081005761
1999-07-01	38.2746182584525
1999-10-01	38.6950499973728
2000-01-01	37.6140138274904
2000-04-01	37.1859929696309
2000-07-01	37.2348459666854
2000-10-01	37.1038381049960
2001-01-01	36.3921084441774
2001-04-01	34.6344723731896
2001-07-01	33.8255049924967
2001-10-01	32.7672819149846
2002-01-01	32.1547260198735
2002-04-01	31.8933176461639
2002-07-01	30.8363860246367
2002-10-01	29.8964465573174
2003-01-01	30.4062863903014
2003-04-01	30.0881651845863
2003-07-01	29.9314227211394
2003-10-01	28.7506408099260
2004-01-01	27.8014758390319
2004-04-01	26.5707108583029
2004-07-01	25.5144672099651
2004-10-01	25.3821571950531
2005-01-01	25.1597476898536
2005-04-01	24.0583937838075
2005-07-01	24.0303751819718
2005-10-01	24.2300979534526
2006-01-01	24.0553954121017
2006-04-01	24.6741345886551
2006-07-01	24.4699736729521
2006-10-01	25.1035632429091
2007-01-01	25.0468491661121
2007-04-01	24.9767099406115
2007-07-01	24.2177939779836
2007-10-01	23.3500858798869
2008-01-01	23.5949502380676
2008-04-01	23.6056223563190
2008-07-01	23.7633578748022
2008-10-01	22.2038958637090
2009-01-01	20.6860694871580
2009-04-01	20.4277026896199
2009-07-01	19.5980868513755
2009-10-01	19.3580688385543
2010-01-01	19.7847920448706
2010-04-01	19.5805985398681
2010-07-01	19.8000859471650
2010-10-01	20.3960567688633
2011-01-01	19.9912665823127
2011-04-01	20.1543398808580
2011-07-01	19.7264484935750
2011-10-01	18.9736085924550
2012-01-01	18.6945667197979
2012-04-01	18.7977928274020
2012-07-01	19.8970565525627
2012-10-01	21.7633245904671
2013-01-01	21.2281390370574
2013-04-01	22.5206757952374
2013-07-01	23.7262687692761
2013-10-01	24.7453252829147
2014-01-01	27.0748005265210
2014-04-01	26.2080533764467
2014-07-01	26.0726385464532
2014-10-01	26.2946211008629
2015-01-01	26.8718009625169
2015-04-01	27.8471009610240
2015-07-01	28.6496259393479
2015-10-01	29.0436961744193
2016-01-01	30.4873433450544
2016-04-01	31.6857217129495
2016-07-01	31.7190665619573
2016-10-01	31.9544455901526
2017-01-01	32.0324174882423
2017-04-01	32.8689490159606
2017-07-01	33.4597214275697
2017-10-01	33.3990113369879
2018-01-01	33.3258357980829
2018-04-01	33.8017501969698