Quarter	Percent, Seasonally Adjusted
1999-01-01	57.1194899311445
1999-04-01	57.2491951735159
1999-07-01	56.9486207515838
1999-10-01	56.1645996684797
2000-01-01	56.1955423055491
2000-04-01	56.1455137579817
2000-07-01	55.9675022395771
2000-10-01	56.0369204970808
2001-01-01	57.2285365515136
2001-04-01	57.0945780008206
2001-07-01	56.9231747480736
2001-10-01	56.5641348669449
2002-01-01	56.0155447661195
2002-04-01	55.8950096211229
2002-07-01	55.8320859776843
2002-10-01	55.5114846009285
2003-01-01	55.5239370296159
2003-04-01	55.3022872155980
2003-07-01	54.9641789383564
2003-10-01	54.7564532557964
2004-01-01	54.7601383022990
2004-04-01	54.9361119402083
2004-07-01	54.6444224980605
2004-10-01	54.3828976100282
2005-01-01	52.7327201464072
2005-04-01	51.8821066256543
2005-07-01	51.7056926964250
2005-10-01	52.0090036024793
2006-01-01	51.7337600692531
2006-04-01	51.6757499221901
2006-07-01	52.0999727430721
2006-10-01	51.8161217903701
2007-01-01	52.1170683731196
2007-04-01	52.0245331087045
2007-07-01	51.9465802110004
2007-10-01	52.3677469456472
2008-01-01	52.3685495961231
2008-04-01	52.1777972815752
2008-07-01	52.1197431308908
2008-10-01	52.5516324460786
2009-01-01	53.3674900403828
2009-04-01	54.6549629553638
2009-07-01	55.4265560146639
2009-10-01	56.4358832984629
2010-01-01	56.7371492952006
2010-04-01	56.8776637559164
2010-07-01	57.8276303209310
2010-10-01	57.9282551060174
2011-01-01	58.5058076583261
2011-04-01	58.8580582813907
2011-07-01	58.8780906787046
2011-10-01	60.1082534142506
2012-01-01	60.3578138921825
2012-04-01	60.5904612411702
2012-07-01	61.2625928671122
2012-10-01	61.6918627685624
2013-01-01	61.3471420775261
2013-04-01	62.2753840043000
2013-07-01	62.5560195953280
2013-10-01	62.7238534451767
2014-01-01	63.5797777733825
2014-04-01	64.5301777878783
2014-07-01	64.7062170299370
2014-10-01	64.3287291124043
2015-01-01	65.0455094995062
2015-04-01	65.0470571208952
2015-07-01	65.0373015305031
2015-10-01	66.0055896382658
2016-01-01	66.5375508510069
2016-04-01	66.4958452587493
2016-07-01	67.2252147454887
2016-10-01	67.5514972851626
2017-01-01	66.8094029703604
2017-04-01	67.0739091947104
2017-07-01	66.3204923023274
2017-10-01	66.4835212169578
2018-01-01	67.1250659351993
2018-04-01	66.8367022201412
2018-07-01	67.0971332333913