Quarter	Percent, Seasonally Adjusted
1999-01-01	19.1757824268232
1999-04-01	19.3855941676796
1999-07-01	19.5879647790848
1999-10-01	19.6685189621886
2000-01-01	19.3595792810427
2000-04-01	19.9421095374103
2000-07-01	20.2374137437960
2000-10-01	20.2465355542899
2001-01-01	20.4672752611852
2001-04-01	20.5761233511864
2001-07-01	20.5433680781091
2001-10-01	20.6159135756050
2002-01-01	20.1053985299793
2002-04-01	20.4872153965601
2002-07-01	20.6684126238594
2002-10-01	20.4128140458186
2003-01-01	19.7189474781219
2003-04-01	20.1778481935465
2003-07-01	20.4942047118456
2003-10-01	20.1737515252404
2004-01-01	22.6693030149864
2004-04-01	22.5461321828550
2004-07-01	22.6122409945819
2004-10-01	22.7818228831344
2005-01-01	22.7675387160078
2005-04-01	21.9942925831343
2005-07-01	21.5831506551131
2005-10-01	21.5197185161279
2006-01-01	21.4320134242971
2006-04-01	21.1861132807245
2006-07-01	20.8412470625041
2006-10-01	21.0257891950872
2007-01-01	20.4507697445167
2007-04-01	19.9443190432816
2007-07-01	19.6046329929591
2007-10-01	20.1505870236905
2008-01-01	19.5071221428317
2008-04-01	19.9327663495981
2008-07-01	20.3597763884552
2008-10-01	20.1785292919896
2009-01-01	20.3848531286575
2009-04-01	20.1755304937712
2009-07-01	19.8739747642933
2009-10-01	19.5788383571501
2010-01-01	20.1041007354337
2010-04-01	20.1407660932986
2010-07-01	19.8524786116040
2010-10-01	19.8283368873052
2011-01-01	20.0351240591904
2011-04-01	19.9857718970707
2011-07-01	20.1971990648441
2011-10-01	20.1418196394113
2012-01-01	20.1384611270411
2012-04-01	19.5345862222563
2012-07-01	19.7101826969167
2012-10-01	19.6612103478228
2013-01-01	19.4124851121251
2013-04-01	19.5070883401244
2013-07-01	19.5977750508663
2013-10-01	19.8138368871413
2014-01-01	20.1138645455872
2014-04-01	20.1214748717922
2014-07-01	19.8602806131397
2014-10-01	19.9096144235506
2015-01-01	19.7637790225544
2015-04-01	20.0094222054961
2015-07-01	19.9292013303193
2015-10-01	19.8079985135593
2016-01-01	19.4108803199427
2016-04-01	19.3358421762319
2016-07-01	19.0331399971855
2016-10-01	19.4037414831654
2017-01-01	19.2734278783690
2017-04-01	19.0399175692130
2017-07-01	19.1075543078593
2017-10-01	18.4842823540355
2018-01-01	18.4447865001190
2018-04-01	18.3630057294523