Quarter	Percent, Seasonally Adjusted
1999-01-01	63.6157082787760
1999-04-01	63.5038620379789
1999-07-01	63.9036779190221
1999-10-01	64.4891949104016
2000-01-01	61.0083159854856
2000-04-01	60.3991541924203
2000-07-01	60.0317828573174
2000-10-01	59.7744274371360
2001-01-01	59.5052507793664
2001-04-01	59.4630613096306
2001-07-01	59.0998533514555
2001-10-01	58.8893263793862
2002-01-01	60.5002990724218
2002-04-01	59.8519184909110
2002-07-01	59.4888413768902
2002-10-01	59.7383668003781
2003-01-01	60.1280157904025
2003-04-01	60.7185812085984
2003-07-01	59.6742330663293
2003-10-01	60.5400590091936
2004-01-01	60.5420378770296
2004-04-01	59.9278536803036
2004-07-01	60.2106328038084
2004-10-01	61.1823504817500
2005-01-01	60.6777150240276
2005-04-01	62.3915429902602
2005-07-01	62.7547696545349
2005-10-01	61.9595861122421
2006-01-01	61.8937327566805
2006-04-01	61.3663289647932
2006-07-01	62.3627001294970
2006-10-01	61.7723503884650
2007-01-01	62.2321555819553
2007-04-01	63.2040018556633
2007-07-01	63.4724424969238
2007-10-01	62.5056238924636
2008-01-01	62.9240772627734
2008-04-01	62.6492336821399
2008-07-01	62.8954809495024
2008-10-01	63.1068693874602
2009-01-01	62.6639490805185
2009-04-01	62.6899472038742
2009-07-01	62.9881676096523
2009-10-01	63.0862570186287
2010-01-01	62.6899576239304
2010-04-01	61.8324601690796
2010-07-01	62.1668049115334
2010-10-01	63.7419646651736
2011-01-01	63.5016935812631
2011-04-01	64.0008464087478
2011-07-01	63.9724232573709
2011-10-01	63.1239878285068
2012-01-01	62.7932298027820
2012-04-01	64.0692129302324
2012-07-01	62.9704145772642
2012-10-01	62.6671883399309
2013-01-01	62.7680827788685
2013-04-01	62.7926102390211
2013-07-01	61.8087824891030
2013-10-01	61.7011437179223
2014-01-01	61.6865062203803
2014-04-01	59.7831180640765
2014-07-01	60.6899374757650
2014-10-01	60.6041362546638
2015-01-01	60.7432648044886
2015-04-01	60.8521626010797
2015-07-01	60.8006470009620
2015-10-01	60.3814551498046
2016-01-01	60.0469847859758
2016-04-01	60.3296241253125
2016-07-01	60.8483836188107
2016-10-01	59.7727906267990
2017-01-01	59.0487222035726
2017-04-01	58.2340596541622
2017-07-01	57.8896531553319
2017-10-01	58.5393688535195
2018-01-01	58.2754810635069
2018-04-01	59.0904070128020