Quarter	Percent, Seasonally Adjusted
1999-01-01	19.0485835550604
1999-04-01	20.5125511106441
1999-07-01	24.3070547950622
1999-10-01	21.3204298521641
2000-01-01	18.0186515311333
2000-04-01	19.2452268413413
2000-07-01	24.2739894147427
2000-10-01	18.8973127973410
2001-01-01	18.1394158300390
2001-04-01	20.6000553314792
2001-07-01	24.8501938667607
2001-10-01	19.6827136810694
2002-01-01	20.0666561578130
2002-04-01	21.9025847129531
2002-07-01	26.0890891117500
2002-10-01	21.8145440210641
2003-01-01	19.1996730326224
2003-04-01	21.8433256295222
2003-07-01	25.0404524510333
2003-10-01	19.2501365938658
2004-01-01	17.9261699308962
2004-04-01	20.8979200133520
2004-07-01	24.1148189038071
2004-10-01	18.9191804683828
2005-01-01	18.1304159160541
2005-04-01	19.9690793210071
2005-07-01	23.5117142491358
2005-10-01	18.7158469945355
2006-01-01	18.3946681118728
2006-04-01	19.3087121212121
2006-07-01	21.6800060360888
2006-10-01	17.7621567978829
2007-01-01	17.4811879067027
2007-04-01	20.0459556907943
2007-07-01	22.6434643995749
2007-10-01	18.0552767535472
2008-01-01	18.2145370056340
2008-04-01	20.3320916661235
2008-07-01	22.4099576548425
2008-10-01	20.5053407560482
2009-01-01	20.0996807570447
2009-04-01	22.9451317416473
2009-07-01	25.5759018840826
2009-10-01	21.0383319424488
2010-01-01	20.1237139947799
2010-04-01	22.4686663850162
2010-07-01	24.8411183070227
2010-10-01	20.1274965318301
2011-01-01	19.9723085708744
2011-04-01	21.3923662682415
2011-07-01	26.0280837291852
2011-10-01	22.4360245982940
2012-01-01	21.7322721732272
2012-04-01	22.8444711719161
2012-07-01	26.7864320201881
2012-10-01	23.0319741976587
2013-01-01	22.6904689673930
2013-04-01	23.7391116086029
2013-07-01	28.2124020894330
2013-10-01	24.9289081064236
2014-01-01	23.3109695075874
2014-04-01	25.9144340913778
2014-07-01	29.1837054139193
2014-10-01	25.3567070093501
2015-01-01	23.9049136300411
2015-04-01	25.3646722078494
2015-07-01	29.0491537202263
2015-10-01	25.4750273803522
2016-01-01	26.3935295290622
2016-04-01	25.7763386782866
2016-07-01	29.3501561830097
2016-10-01	24.4930449062138
2017-01-01	26.5773739006815
2017-04-01	25.2263811401657
2017-07-01	28.6177332126568
2017-10-01	25.0729937469031
2018-01-01	25.9704103996464
2018-04-01	23.4743798139934