Quarter	Percent, Seasonally Adjusted
1998-01-01	84.4403729624342
1998-04-01	84.4180503398011
1998-07-01	84.2785634157348
1998-10-01	84.2189281221449
1999-01-01	84.2119875883842
1999-04-01	84.0865411194054
1999-07-01	84.1079527206630
1999-10-01	84.3016440836298
2000-01-01	84.4066186366351
2000-04-01	83.8872295572581
2000-07-01	83.8292492048414
2000-10-01	83.6388471483934
2001-01-01	83.2536938308551
2001-04-01	83.5002373705790
2001-07-01	82.9165639589933
2001-10-01	82.5737966127878
2002-01-01	82.4334672321712
2002-04-01	82.0087211615339
2002-07-01	81.6391920241574
2002-10-01	81.4423472556684
2003-01-01	81.3570380559148
2003-04-01	80.7770465293702
2003-07-01	80.4773589159026
2003-10-01	80.2304258158085
2004-01-01	80.2246244572366
2004-04-01	79.8227843828368
2004-07-01	79.0520093608156
2004-10-01	78.7649589563061
2005-01-01	78.6634774780883
2005-04-01	78.6491621054621
2005-07-01	78.7384584334054
2005-10-01	78.0415146966122
2006-01-01	77.9894667345826
2006-04-01	77.6390673955056
2006-07-01	77.2558602244168
2006-10-01	77.1846725361895
2007-01-01	76.7189276211742
2007-04-01	76.6729607063098
2007-07-01	76.5391012508091
2007-10-01	76.3014836158338
2008-01-01	76.2055293183875
2008-04-01	75.4177652251531
2008-07-01	75.0497580513796
2008-10-01	74.9260134020046
2009-01-01	74.3056926550494
2009-04-01	73.8813366839561
2009-07-01	74.0728225650774
2009-10-01	73.8295444118609
2010-01-01	73.4175247221822
2010-04-01	73.4110667438224
2010-07-01	73.0091690546254
2010-10-01	72.6075158687155
2011-01-01	72.0397279789214
2011-04-01	71.6716118145464
2011-07-01	70.9638831100169
2011-10-01	70.0063909299366
2012-01-01	68.9510540359088
2012-04-01	67.8619865362690
2012-07-01	67.5681779648049
2012-10-01	66.9465859273442
2013-01-01	66.5784532761775
2013-04-01	65.7644831604191
2013-07-01	64.8072584244380
2013-10-01	64.2182558013857
2014-01-01	62.7239755034027
2014-04-01	62.1872612823123
2014-07-01	61.3051870775408
2014-10-01	60.6566732568654
2015-01-01	60.6714801715370
2015-04-01	60.4039510958534
2015-07-01	60.4847755683105
2015-10-01	60.0083328131105
2016-01-01	59.3129196439861
2016-04-01	58.3920770146581
2016-07-01	58.0212446840309
2016-10-01	57.4143350390507
2017-01-01	56.5345288527837
2017-04-01	55.9183536171159
2017-07-01	55.1179456871801
2017-10-01	54.3155215604424
2018-01-01	54.0910103686971
2018-04-01	53.4126950777932