Quarter	Percent, Seasonally Adjusted
1999-01-01	40.4559397208942
1999-04-01	40.2754212415198
1999-07-01	40.1167138680549
1999-10-01	40.0835040708614
2000-01-01	40.0470959449248
2000-04-01	39.9332578175599
2000-07-01	39.8769768062206
2000-10-01	39.6079053995770
2001-01-01	39.9953799534422
2001-04-01	40.4083425104825
2001-07-01	40.4563166077242
2001-10-01	40.6722975121178
2002-01-01	40.4387949344426
2002-04-01	40.3710514659389
2002-07-01	40.2650131075610
2002-10-01	40.0873989144480
2003-01-01	39.7303585192660
2003-04-01	39.3201859319935
2003-07-01	39.3083723737716
2003-10-01	39.2943343791874
2004-01-01	39.4074321829812
2004-04-01	39.7373368207792
2004-07-01	39.7403245119849
2004-10-01	39.3053742132213
2005-01-01	38.9803935201207
2005-04-01	38.7284501065716
2005-07-01	38.4714958141015
2005-10-01	38.4635044339511
2006-01-01	38.0330099451672
2006-04-01	37.9498307937742
2006-07-01	38.0686695980670
2006-10-01	37.8625654207142
2007-01-01	38.1036596421851
2007-04-01	38.3426328566179
2007-07-01	38.5019216927527
2007-10-01	38.5293325777490
2008-01-01	38.8514696941887
2008-04-01	39.0000987176617
2008-07-01	38.6406286294459
2008-10-01	38.7216314764314
2009-01-01	38.8127266243034
2009-04-01	38.7414704069437
2009-07-01	38.9467104472253
2009-10-01	38.6085868185259
2010-01-01	38.1957209129136
2010-04-01	38.0756169615035
2010-07-01	38.0349116801833
2010-10-01	38.0360236941441
2011-01-01	37.9542991577585
2011-04-01	37.6747640757278
2011-07-01	37.5656288115598
2011-10-01	37.3475303516066
2012-01-01	36.9037957453138
2012-04-01	36.4104230328779
2012-07-01	36.0279494366917
2012-10-01	35.8102598015130
2013-01-01	36.0977490359873
2013-04-01	35.4226399924964
2013-07-01	35.0722979883186
2013-10-01	34.6196905001052
2014-01-01	33.4823574813538
2014-04-01	33.2401640037224
2014-07-01	32.7895409850205
2014-10-01	32.5557701911860
2015-01-01	31.9274455969601
2015-04-01	31.5130127560614
2015-07-01	31.0961814233837
2015-10-01	30.8810808295470
2016-01-01	30.3875236841793
2016-04-01	29.9931884310400
2016-07-01	29.7099400348839
2016-10-01	29.3670841749192
2017-01-01	29.3144566243731
2017-04-01	28.8773163739462
2017-07-01	28.6699281438166
2017-10-01	28.5029977572746
2018-01-01	28.2054574000327
2018-04-01	28.1176978974991