Quarter	Percent, Seasonally Adjusted
1999-01-01	74.9332505724323
1999-04-01	74.9780958701955
1999-07-01	75.6932850332456
1999-10-01	75.5646218760069
2000-01-01	75.3836330092040
2000-04-01	75.3327958776058
2000-07-01	76.0303509078409
2000-10-01	75.8495666084040
2001-01-01	75.3077628926456
2001-04-01	74.5369495129042
2001-07-01	74.2444720877271
2001-10-01	74.0567870302853
2002-01-01	73.3063031792876
2002-04-01	73.5201341830148
2002-07-01	73.1633345941545
2002-10-01	72.3429607712514
2003-01-01	72.8580180143750
2003-04-01	71.7375487066222
2003-07-01	70.9100598200724
2003-10-01	70.5507672219979
2004-01-01	70.0163382245446
2004-04-01	68.7463479282332
2004-07-01	67.6668070323082
2004-10-01	66.9234799069924
2005-01-01	66.3618423506354
2005-04-01	65.3513332203146
2005-07-01	64.6348901668074
2005-10-01	63.6848377588116
2006-01-01	63.7881793555844
2006-04-01	63.3707285195525
2006-07-01	63.3435353216696
2006-10-01	62.8157989962266
2007-01-01	62.3986518539923
2007-04-01	61.3908108929056
2007-07-01	60.7663994487598
2007-10-01	60.1846963116014
2008-01-01	59.1506829841269
2008-04-01	58.6063023638628
2008-07-01	57.2543910447152
2008-10-01	57.2825692079988
2009-01-01	57.8417230442775
2009-04-01	57.4268428131648
2009-07-01	56.7960393826103
2009-10-01	56.6835709231088
2010-01-01	55.1645596155960
2010-04-01	54.6061368881138
2010-07-01	54.9689321434754
2010-10-01	54.8450120981628
2011-01-01	55.2290255199418
2011-04-01	54.3598554953370
2011-07-01	53.5539944147084
2011-10-01	52.9914649898251
2012-01-01	52.5750564245413
2012-04-01	51.5090530532586
2012-07-01	51.4869499106126
2012-10-01	50.3933810378233
2013-01-01	50.4833657782588
2013-04-01	50.3638633720577
2013-07-01	50.5846669964953
2013-10-01	50.6449430713392
2014-01-01	50.9023371453633
2014-04-01	50.3541615645375
2014-07-01	49.5736575811639
2014-10-01	48.8757009951680
2015-01-01	48.6810930272184
2015-04-01	48.9579067324206
2015-07-01	48.0975563220935
2015-10-01	47.0464121387475
2016-01-01	47.4792255478745
2016-04-01	45.3980628491610
2016-07-01	46.1986279676347
2016-10-01	45.4051217554864
2017-01-01	44.8747580879787
2017-04-01	43.5364958888817
2017-07-01	43.5112422382451
2017-10-01	42.6035291652351
2018-01-01	43.0187203004260
2018-04-01	43.4892094926439