Quarter	Percent, Seasonally Adjusted
1999-01-01	38.8058384311607
1999-04-01	39.1434570149471
1999-07-01	39.6086200370823
1999-10-01	40.2135273923478
2000-01-01	40.3987134817426
2000-04-01	40.7124113569542
2000-07-01	41.0471726208414
2000-10-01	41.2131557008163
2001-01-01	39.5507486549974
2001-04-01	39.5543100303590
2001-07-01	40.0807985989248
2001-10-01	40.4320101857151
2002-01-01	41.4703421698601
2002-04-01	42.0997793618463
2002-07-01	42.5452741213952
2002-10-01	42.7577408491927
2003-01-01	43.1742434661590
2003-04-01	43.5832565695522
2003-07-01	44.1730449248838
2003-10-01	44.4454387541498
2004-01-01	44.6315898082373
2004-04-01	44.9581304888150
2004-07-01	45.4050943768878
2004-10-01	45.7957127825448
2005-01-01	45.9797254341625
2005-04-01	46.5418746257604
2005-07-01	46.5270024259964
2005-10-01	46.9183559131836
2006-01-01	47.3998972444872
2006-04-01	47.8347298933956
2006-07-01	47.9194030852379
2006-10-01	48.4621290943975
2007-01-01	48.5723261469699
2007-04-01	48.7188691111072
2007-07-01	49.1900034481586
2007-10-01	49.3496756017278
2008-01-01	49.6619725950983
2008-04-01	50.1125329786283
2008-07-01	50.4771488507254
2008-10-01	51.1452004655110
2009-01-01	51.3439085089139
2009-04-01	51.3563537077518
2009-07-01	51.5346955651909
2009-10-01	51.5521740294844
2010-01-01	51.8897153352990
2010-04-01	52.0125620461738
2010-07-01	52.2841597110125
2010-10-01	52.4340346832885
2011-01-01	52.5195913246647
2011-04-01	52.9299986050701
2011-07-01	52.9575344833086
2011-10-01	52.8573929305746
2012-01-01	53.3610704993155
2012-04-01	53.3408176255064
2012-07-01	53.5873866477886
2012-10-01	53.4570626606785
2013-01-01	53.5369487972722
2013-04-01	53.3192250187161
2013-07-01	53.3438037430719
2013-10-01	53.3394859911092
2014-01-01	53.2002514761217
2014-04-01	53.0210249817840
2014-07-01	52.9199291180008
2014-10-01	53.2914643153290
2015-01-01	53.0042069057473
2015-04-01	53.3272462044852
2015-07-01	52.9847830580356
2015-10-01	53.1549498408223
2016-01-01	53.1113189770860
2016-04-01	53.1911124662929
2016-07-01	53.1418756688697
2016-10-01	52.7312088476494
2017-01-01	52.6952960331572
2017-04-01	52.5255286004913
2017-07-01	52.6393392069473
2017-10-01	52.6437537380422
2018-01-01	52.3876522272488
2018-04-01	52.5042662893456
2018-07-01	52.4222684033761