Quarter	Percent, Seasonally Adjusted
1998-01-01	45.6184285803041
1998-04-01	45.7552272154111
1998-07-01	45.9501722236574
1998-10-01	46.0796276268456
1999-01-01	46.2465732863187
1999-04-01	46.3964363550678
1999-07-01	46.5239493906283
1999-10-01	46.6640538103822
2000-01-01	46.7226019279895
2000-04-01	47.1256631286760
2000-07-01	47.4663753147937
2000-10-01	47.8897237722349
2001-01-01	48.0555437317590
2001-04-01	48.0450196423829
2001-07-01	48.3227859232603
2001-10-01	48.4504061880337
2002-01-01	48.7929973310966
2002-04-01	48.7599029756338
2002-07-01	48.9371067381821
2002-10-01	49.0329368247670
2003-01-01	49.1809047795202
2003-04-01	49.3162626018546
2003-07-01	49.5227043225288
2003-10-01	49.5004499507510
2004-01-01	50.4093004635115
2004-04-01	50.5787587807522
2004-07-01	50.6353853310163
2004-10-01	50.7002124465866
2005-01-01	50.4770583729885
2005-04-01	50.3642128307219
2005-07-01	50.2085834665808
2005-10-01	50.5194700168318
2006-01-01	50.9443056300865
2006-04-01	51.1710924196903
2006-07-01	50.9824662302703
2006-10-01	51.0655023771694
2007-01-01	50.9653924175611
2007-04-01	51.1443377112012
2007-07-01	51.4620396028074
2007-10-01	51.3701625192300
2008-01-01	51.4271132410504
2008-04-01	51.4768257140785
2008-07-01	51.4126615782267
2008-10-01	51.0745600865780
2009-01-01	50.6052797761460
2009-04-01	50.3990161854881
2009-07-01	50.1049477183584
2009-10-01	49.8862790283690
2010-01-01	49.8424704676314
2010-04-01	49.7783714229454
2010-07-01	49.5788289369875
2010-10-01	49.7785481412560
2011-01-01	49.9530186466400
2011-04-01	49.8265018627380
2011-07-01	49.7725004515471
2011-10-01	49.6974002572381
2012-01-01	49.7322107780211
2012-04-01	49.7251165219280
2012-07-01	49.5858726370815
2012-10-01	49.3683812874703
2013-01-01	48.9084896068395
2013-04-01	48.5043565176945
2013-07-01	48.4165272867824
2013-10-01	48.5334569898973
2014-01-01	48.5678676319379
2014-04-01	48.5752701444214
2014-07-01	48.7048645203260
2014-10-01	48.8729428830534
2015-01-01	48.9593536524312
2015-04-01	49.0098941998213
2015-07-01	49.3715424181372
2015-10-01	49.4512131138432
2016-01-01	49.6577321615260
2016-04-01	50.0704019018836
2016-07-01	50.0104867613875
2016-10-01	50.1918806492450
2017-01-01	50.5351777205193
2017-04-01	50.5193292440547
2017-07-01	50.7643276750210
2017-10-01	50.9329251602092
2018-01-01	50.9929944747252
2018-04-01	51.4226378677472