Quarter	Percent, Seasonally Adjusted
1999-01-01	60.2869398190198
1999-04-01	58.1673448703735
1999-07-01	58.5850285905265
1999-10-01	57.8231952488474
2000-01-01	61.1608527572179
2000-04-01	61.3591402155487
2000-07-01	60.0646522020176
2000-10-01	60.7730815568766
2001-01-01	61.7680066876609
2001-04-01	62.7448164430142
2001-07-01	63.3298157737086
2001-10-01	63.5952531742711
2002-01-01	60.9808198907750
2002-04-01	62.2216374758171
2002-07-01	65.1000014043459
2002-10-01	65.2913131747355
2003-01-01	64.0362903995973
2003-04-01	65.0672704529278
2003-07-01	67.6067935560815
2003-10-01	62.4317154460566
2004-01-01	59.7370916619131
2004-04-01	59.4328415043701
2004-07-01	59.9620250917748
2004-10-01	59.5091000088474
2005-01-01	57.6736970043599
2005-04-01	62.3472300565213
2005-07-01	59.2833362601257
2005-10-01	58.6469577025597
2006-01-01	58.8984978679691
2006-04-01	57.4769177946971
2006-07-01	59.7035100016500
2006-10-01	61.4855264405188
2007-01-01	58.7331515251618
2007-04-01	58.4780262043083
2007-07-01	56.7020297691633
2007-10-01	58.7306992816466
2008-01-01	58.3009946751235
2008-04-01	57.7557656781960
2008-07-01	54.3968840506794
2008-10-01	57.9579816378189
2009-01-01	61.2423005913950
2009-04-01	59.1909179881102
2009-07-01	56.2599445772344
2009-10-01	59.8143457964894
2010-01-01	58.5464347159594
2010-04-01	59.8120843236067
2010-07-01	61.8764459893113
2010-10-01	60.1929281256806
2011-01-01	62.6576169718907
2011-04-01	63.2340783937918
2011-07-01	63.3296344037426
2011-10-01	61.0704998417347
2012-01-01	63.4089680773334
2012-04-01	67.6710122318148
2012-07-01	66.2536678782274
2012-10-01	65.1750691991027
2013-01-01	65.9326908255705
2013-04-01	64.8462712937550
2013-07-01	65.7598925269920
2013-10-01	68.1779460934070
2014-01-01	67.7607885540129
2014-04-01	65.8843525772829
2014-07-01	67.0315533874163
2014-10-01	64.8900185398982
2015-01-01	65.6311125474212
2015-04-01	63.5109482239750
2015-07-01	64.7489601329736
2015-10-01	64.6922187341846
2016-01-01	66.5828274944229
2016-04-01	66.8127183771895
2016-07-01	66.6590372502261
2016-10-01	65.0613356566636
2017-01-01	61.8622394182666
2017-04-01	60.8959945185841
2017-07-01	59.4095425787353
2017-10-01	61.3768216423712
2018-01-01	59.6967856741695
2018-04-01	58.8176244714207