Quarter	Percent, Seasonally Adjusted
1998-01-01	51.9269997238476
1998-04-01	51.4303105840242
1998-07-01	51.0239020172089
1998-10-01	50.9910946570750
1999-01-01	50.6066330162330
1999-04-01	50.3502200143292
1999-07-01	50.1831798699681
1999-10-01	50.3903582397585
2000-01-01	50.1042261822579
2000-04-01	49.9651693619866
2000-07-01	50.1279190812474
2000-10-01	50.0610884068177
2001-01-01	50.4903515864542
2001-04-01	50.1296075043975
2001-07-01	50.0339898135041
2001-10-01	49.9120212306648
2002-01-01	50.1161566949721
2002-04-01	50.5222087732448
2002-07-01	50.6622798879862
2002-10-01	50.5876944254920
2003-01-01	50.3926065044189
2003-04-01	50.1516957256533
2003-07-01	49.6949465958322
2003-10-01	49.5378859250333
2004-01-01	49.6254741188957
2004-04-01	49.6781690172284
2004-07-01	49.6788935664746
2004-10-01	49.7107862904858
2005-01-01	49.8477509517474
2005-04-01	49.9060521981913
2005-07-01	50.3612358478230
2005-10-01	50.4136443186031
2006-01-01	50.5378502028152
2006-04-01	50.5641589621809
2006-07-01	50.6009305967977
2006-10-01	50.5740525337073
2007-01-01	50.9226930564168
2007-04-01	51.2058912785272
2007-07-01	51.1683443563175
2007-10-01	51.1587011325917
2008-01-01	51.3089562648003
2008-04-01	51.5795576911304
2008-07-01	51.2578117337172
2008-10-01	51.2045798072000
2009-01-01	50.7873981436908
2009-04-01	50.3980371941333
2009-07-01	50.1843737402172
2009-10-01	50.0889389190438
2010-01-01	49.5214798977915
2010-04-01	49.5897329210208
2010-07-01	49.8171997563602
2010-10-01	50.0080633014797
2011-01-01	50.2111781627675
2011-04-01	50.3082885313280
2011-07-01	50.4569943801437
2011-10-01	50.3338851542525
2012-01-01	50.3111221327789
2012-04-01	50.6552696621408
2012-07-01	50.8620531868650
2012-10-01	51.0385225925590
2013-01-01	51.2889990934990
2013-04-01	51.7666349702912
2013-07-01	51.7655815214471
2013-10-01	51.8380099852677
2014-01-01	51.8535417156949
2014-04-01	51.7863867173350
2014-07-01	52.1469769332828
2014-10-01	52.7379783341786
2015-01-01	52.9914772621760
2015-04-01	53.3163800874746
2015-07-01	53.5885105564012
2015-10-01	53.6094702627012
2016-01-01	54.3980344437756
2016-04-01	54.8234891420662
2016-07-01	54.9120415483894
2016-10-01	55.5443245347745
2017-01-01	55.6034199098509
2017-04-01	55.6759231344232
2017-07-01	56.5329995694756
2017-10-01	56.5894579070427
2018-01-01	56.9651133665361
2018-04-01	57.3733642209776