Quarter	Percent, Seasonally Adjusted
1999-01-01	59.1932866398093
1999-04-01	59.0279212666326
1999-07-01	59.5775941776963
1999-10-01	59.4531467582929
2000-01-01	60.0692586201293
2000-04-01	61.0000712654738
2000-07-01	60.8728702387709
2000-10-01	60.1994510923312
2001-01-01	60.3354015694105
2001-04-01	59.8177366900756
2001-07-01	60.1509300827739
2001-10-01	59.4590671659662
2002-01-01	59.7807239064499
2002-04-01	59.7898662286522
2002-07-01	60.1225520813804
2002-10-01	59.8585878329910
2003-01-01	59.2991830951471
2003-04-01	59.4550287539403
2003-07-01	59.3875396830955
2003-10-01	60.2201080054054
2004-01-01	60.0667086772916
2004-04-01	60.5749503382580
2004-07-01	60.1664729292236
2004-10-01	60.5127824432195
2005-01-01	61.1981410966351
2005-04-01	61.1227901019802
2005-07-01	61.0222191627002
2005-10-01	60.9522658621954
2006-01-01	60.5281627803303
2006-04-01	60.5873631775780
2006-07-01	61.0399320617446
2006-10-01	61.7853006584382
2007-01-01	61.8217745960272
2007-04-01	61.7769132989562
2007-07-01	62.0466687116173
2007-10-01	62.5355941705751
2008-01-01	62.7265199887399
2008-04-01	62.2554112483157
2008-07-01	62.4579247881654
2008-10-01	62.1570025878585
2009-01-01	61.8733848610937
2009-04-01	61.6067476867538
2009-07-01	61.3018771283718
2009-10-01	61.6221503277220
2010-01-01	62.0554003487254
2010-04-01	61.5450488369092
2010-07-01	61.8667383033358
2010-10-01	62.5836090585534
2011-01-01	61.4630581113032
2011-04-01	62.5567900640686
2011-07-01	61.5827106239352
2011-10-01	62.0808721726440
2012-01-01	61.6900849903796
2012-04-01	61.8250914854593
2012-07-01	62.0331452096500
2012-10-01	61.8448029289125
2013-01-01	61.4856799151233
2013-04-01	61.9887243725301
2013-07-01	62.2176812790397
2013-10-01	61.4917363754967
2014-01-01	61.7096858305666
2014-04-01	61.9571759510149
2014-07-01	61.9138697083268
2014-10-01	62.0180839311675
2015-01-01	62.0971185125547
2015-04-01	61.4184664868392
2015-07-01	62.0035228705709
2015-10-01	61.6696297854689
2016-01-01	61.8005090146319
2016-04-01	62.0197716782990
2016-07-01	62.0652077782684
2016-10-01	63.2691295233934
2017-01-01	62.4090743081746
2017-04-01	62.9214832158120
2017-07-01	63.2850779715629
2017-10-01	63.9251373999423
2018-01-01	64.0644839576255
2018-04-01	63.8147363107125