Quarter	Percent, Seasonally Adjusted
1999-04-01	54.3387910424042
1999-07-01	54.3724130669724
1999-10-01	53.9109688909652
2000-01-01	53.7244829655823
2000-04-01	53.7280487493198
2000-07-01	53.4689319852111
2000-10-01	52.9703334215227
2001-01-01	52.4414855987871
2001-04-01	52.1428336880071
2001-07-01	51.8462271043047
2001-10-01	51.4443560299353
2002-01-01	51.3177236297706
2002-04-01	50.9389785480616
2002-07-01	50.5399311153319
2002-10-01	50.1082226019054
2003-01-01	50.1940191588949
2003-04-01	49.6930199885922
2003-07-01	49.6269334510140
2003-10-01	49.4799387333860
2004-01-01	48.9461512342282
2004-04-01	49.4740984234344
2004-07-01	49.8178391363635
2004-10-01	48.5371243329546
2005-01-01	47.7257483406658
2005-04-01	47.0247010539247
2005-07-01	46.7086960226060
2005-10-01	46.2522193569367
2006-01-01	45.7021340006461
2006-04-01	45.5600413659450
2006-07-01	45.5434510086451
2006-10-01	45.4815098396906
2007-01-01	45.0813959409308
2007-04-01	44.7916385228754
2007-07-01	44.6063575569770
2007-10-01	44.5452460492582
2008-01-01	44.6261996688403
2008-04-01	44.4154891953901
2008-07-01	44.0193966498320
2008-10-01	44.1126844135717
2009-01-01	44.5400454390529
2009-04-01	45.0675468432095
2009-07-01	45.1555267879512
2009-10-01	45.8618831257592
2010-01-01	45.3627667666433
2010-04-01	44.8384231958661
2010-07-01	44.4458697714554
2010-10-01	45.0463983406927
2011-01-01	44.9330364640894
2011-04-01	44.3095954643133
2011-07-01	44.5109412500179
2011-10-01	44.3592345295973
2012-01-01	45.1980395037202
2012-04-01	44.8675653388719
2012-07-01	44.9382905139531
2012-10-01	44.3338561177730
2013-01-01	43.1649483511188
2013-04-01	42.9283268117175
2013-07-01	42.5038373033506
2013-10-01	41.2576977838648
2014-01-01	41.7677254711859
2014-04-01	41.8225453905077
2014-07-01	41.0710851687254
2014-10-01	41.1222698002454
2015-01-01	40.6414969137968
2015-04-01	39.6997745177357
2015-07-01	39.5212855248684
2015-10-01	38.9696620811274
2016-01-01	38.8946670399379
2016-04-01	38.8617995503966
2016-07-01	39.1856345224475
2016-10-01	38.6394558511003
2017-01-01	38.2993850694827
2017-04-01	37.8149296752303
2017-07-01	37.5713429926885
2017-10-01	37.4958354078697
2018-01-01	37.5277738596563
2018-04-01	36.6920812113988