Quarter	Percent, Seasonally Adjusted
1999-01-01	51.7335718221205
1999-04-01	51.8049912110957
1999-07-01	51.9858967049320
1999-10-01	52.1552490073034
2000-01-01	52.5457072546757
2000-04-01	52.4549410120592
2000-07-01	52.5474730916506
2000-10-01	52.8366599189770
2001-01-01	53.0508096006877
2001-04-01	53.0525073018649
2001-07-01	53.0902680384404
2001-10-01	52.7661144906850
2002-01-01	52.5021109139787
2002-04-01	52.5886318909061
2002-07-01	52.6213910024825
2002-10-01	52.5467316544568
2003-01-01	52.6865293236972
2003-04-01	52.8499558296388
2003-07-01	53.0026579984816
2003-10-01	52.9839004442093
2004-01-01	52.6520082701860
2004-04-01	52.7830595893671
2004-07-01	52.5590060667704
2004-10-01	52.1696978440302
2005-01-01	51.9638530944352
2005-04-01	51.3394443640121
2005-07-01	50.8802954236040
2005-10-01	51.0547450795917
2006-01-01	50.5594194117574
2006-04-01	50.8184547784341
2006-07-01	50.8039291275652
2006-10-01	50.7119449204012
2007-01-01	50.7420316295609
2007-04-01	50.6667675783203
2007-07-01	50.3092752018075
2007-10-01	50.6975487019490
2008-01-01	50.9838441017674
2008-04-01	51.0187601222093
2008-07-01	51.2637371882903
2008-10-01	50.7376834998616
2009-01-01	50.2194739958796
2009-04-01	50.1865433885875
2009-07-01	50.3397054407902
2009-10-01	50.4643312838458
2010-01-01	50.8058675170864
2010-04-01	50.7585177559748
2010-07-01	50.8870618598139
2010-10-01	50.7767087963578
2011-01-01	50.1958213635936
2011-04-01	50.0413775649048
2011-07-01	50.1132352148253
2011-10-01	50.1956406243409
2012-01-01	50.6164242776829
2012-04-01	50.9188426923492
2012-07-01	50.8460395551296
2012-10-01	50.3448646331834
2013-01-01	51.1272852074834
2013-04-01	50.8927330298802
2013-07-01	51.0393775387227
2013-10-01	51.0600295131624
2014-01-01	51.0729799127561
2014-04-01	50.9941827090800
2014-07-01	50.9891590523066
2014-10-01	51.2510466327017
2015-01-01	51.6929368922000
2015-04-01	51.7381611825135
2015-07-01	51.9896003644510
2015-10-01	52.3909347603570
2016-01-01	52.4510897022762
2016-04-01	52.6877977264991
2016-07-01	52.5699453150809
2016-10-01	52.4993733859652
2017-01-01	52.5820955087996
2017-04-01	52.6347811052055
2017-07-01	52.8400532821363
2017-10-01	52.6346669570192
2018-01-01	52.3298931395606
2018-04-01	52.1228483691475