Quarter	Percent, Seasonally Adjusted
1999-04-01	51.8151634128529
1999-07-01	52.3984381188895
1999-10-01	52.8090516610730
2000-01-01	53.3255258296882
2000-04-01	53.8453930116090
2000-07-01	54.1490945624894
2000-10-01	54.4174629171427
2001-01-01	54.5678218765784
2001-04-01	54.6443928168629
2001-07-01	55.1160510733115
2001-10-01	55.2724064504636
2002-01-01	55.3917674741355
2002-04-01	55.5338629598603
2002-07-01	55.3421339922189
2002-10-01	55.2995653072768
2003-01-01	55.4346092646044
2003-04-01	55.6977038425135
2003-07-01	55.7565516967300
2003-10-01	55.9610285943108
2004-01-01	56.1201702603149
2004-04-01	56.2305854237252
2004-07-01	56.5338545206394
2004-10-01	57.2160656554352
2005-01-01	57.7576861158776
2005-04-01	58.3035134110934
2005-07-01	58.5707865759533
2005-10-01	58.6264904936084
2006-01-01	58.9407173653846
2006-04-01	58.9688007917988
2006-07-01	59.3482058633908
2006-10-01	59.7611678629831
2007-01-01	62.5940717438526
2007-04-01	62.8843276765613
2007-07-01	63.0714773108989
2007-10-01	63.1272007849197
2008-01-01	63.1115031706766
2008-04-01	62.5420843733809
2008-07-01	61.8940820699532
2008-10-01	61.2914006797746
2009-01-01	60.1249198632342
2009-04-01	59.2614447064604
2009-07-01	58.6476578275992
2009-10-01	58.1495794604259
2010-01-01	57.7711631088131
2010-04-01	57.1709607957276
2010-07-01	56.9779422182702
2010-10-01	56.4288818753051
2011-01-01	56.4025247295741
2011-04-01	56.4944949866276
2011-07-01	56.1045171644551
2011-10-01	56.0949332110187
2012-01-01	56.0117339127629
2012-04-01	56.0697297709318
2012-07-01	56.2280410999734
2012-10-01	56.4668368120768
2013-01-01	56.5701103735370
2013-04-01	57.0355392432157
2013-07-01	57.5013114195941
2013-10-01	57.4277019401616
2014-01-01	57.6364597905068
2014-04-01	57.7249617447529
2014-07-01	58.1498047599693
2014-10-01	58.5059164112003
2015-01-01	58.6942684773497
2015-04-01	59.0061529982756
2015-07-01	59.4529789425837
2015-10-01	60.1695975265226
2016-01-01	60.5864858213596
2016-04-01	61.0799110884367
2016-07-01	61.5114729164349
2016-10-01	61.5208837667530
2017-01-01	62.1001023439042
2017-04-01	62.2247232083197
2017-07-01	62.3836115461711
2017-10-01	62.8263493428624
2018-01-01	62.8882683781049
2018-04-01	63.2902175603264