Quarter	Percent, Seasonally Adjusted
1999-01-01	73.5770639624446
1999-04-01	73.7969956168582
1999-07-01	74.4130043181096
1999-10-01	74.8159606138174
2000-01-01	73.1704252592846
2000-04-01	73.9856670864469
2000-07-01	71.7172050054795
2000-10-01	72.3628507400634
2001-01-01	74.2172059274796
2001-04-01	73.7647696305868
2001-07-01	74.1888172513082
2001-10-01	73.8949695512359
2002-01-01	72.0815733659549
2002-04-01	73.2323811911011
2002-07-01	71.8605228016418
2002-10-01	72.0666300169210
2003-01-01	72.4469270054131
2003-04-01	71.2078189570616
2003-07-01	70.7902722657311
2003-10-01	69.6178739118664
2004-01-01	69.3910930183561
2004-04-01	68.6640360334507
2004-07-01	68.3348691130906
2004-10-01	68.9880713232863
2005-01-01	67.9142690648675
2005-04-01	66.3859274285117
2005-07-01	65.9039621686872
2005-10-01	66.6786415353867
2006-01-01	67.2118992538144
2006-04-01	67.7364489101745
2006-07-01	66.2431590825070
2006-10-01	64.4957545099290
2007-01-01	63.7859155480616
2007-04-01	64.7056936914503
2007-07-01	64.3870193816694
2007-10-01	63.5698686758864
2008-01-01	63.7794037714680
2008-04-01	65.8754572355546
2008-07-01	62.4763095803663
2008-10-01	63.5344178978428
2009-01-01	63.9237602266878
2009-04-01	63.0757136936203
2009-07-01	62.3518579548380
2009-10-01	62.0562087553578
2010-01-01	61.3114471842244
2010-04-01	61.1407318942025
2010-07-01	60.5447150399130
2010-10-01	60.4120810209211
2011-01-01	60.9131692953481
2011-04-01	58.2888459709433
2011-07-01	59.6541421292158
2011-10-01	59.8283156980343
2012-01-01	59.5925025746344
2012-04-01	58.0032203039409
2012-07-01	57.8607511662961
2012-10-01	59.1392273562288
2013-01-01	56.7539669076321
2013-04-01	56.2028326254695
2013-07-01	54.6160347330469
2013-10-01	56.0328210884074
2014-01-01	56.4377046702577
2014-04-01	54.1852911971551
2014-07-01	55.5583373947029
2014-10-01	53.5536048182762
2015-01-01	54.0859138287697
2015-04-01	53.4458506812788
2015-07-01	52.8641463956811
2015-10-01	53.0598162021365
2016-01-01	53.3552123771744
2016-04-01	51.3057677075467
2016-07-01	51.7876442152112
2016-10-01	50.9839028486475
2017-01-01	50.0059593571824
2017-04-01	49.1964824022007
2017-07-01	48.2685757017440
2017-10-01	47.4939525610044
2018-01-01	47.8697086921978
2018-04-01	47.9871989564546