Quarter	Percent, Seasonally Adjusted
1999-01-01	63.2972391429765
1999-04-01	60.1950591409568
1999-07-01	61.4888895652339
1999-10-01	65.4750364332832
2000-01-01	64.8369143293269
2000-04-01	62.0937085423890
2000-07-01	64.3076809487003
2000-10-01	65.4254236423805
2001-01-01	62.6761465845936
2001-04-01	63.1823734780722
2001-07-01	66.2086015529222
2001-10-01	69.7764660329086
2002-01-01	65.7546935212027
2002-04-01	64.2763542239705
2002-07-01	65.2201480254820
2002-10-01	62.9333329517817
2003-01-01	66.4157291847316
2003-04-01	67.6515523222869
2003-07-01	69.8428474830626
2003-10-01	65.2230294302272
2004-01-01	64.9934049899432
2004-04-01	68.7509628687644
2004-07-01	69.0268998558930
2004-10-01	66.5421419515621
2005-01-01	66.4084566700139
2005-04-01	66.3054709869391
2005-07-01	65.1567791502751
2005-10-01	64.3855451778730
2006-01-01	65.6092563719647
2006-04-01	67.7299324998739
2006-07-01	66.9561003869662
2006-10-01	68.0623025376774
2007-01-01	66.2833342059621
2007-04-01	64.5419425099700
2007-07-01	64.9430888693004
2007-10-01	63.9906582108547
2008-01-01	64.8465301170036
2008-04-01	64.7063083563053
2008-07-01	65.6303582458624
2008-10-01	65.7449758544323
2009-01-01	63.8914972627949
2009-04-01	65.0271774299166
2009-07-01	65.8518431809642
2009-10-01	64.6907517852668
2010-01-01	63.5887187645058
2010-04-01	62.2929665520810
2010-07-01	63.8287746014141
2010-10-01	63.4119305653909
2011-01-01	62.9581681906992
2011-04-01	63.6327978646204
2011-07-01	64.1271619831801
2011-10-01	64.5737201688360
2012-01-01	65.1459931189399
2012-04-01	65.6934606434469
2012-07-01	65.3075211427940
2012-10-01	67.5249725203494
2013-01-01	66.2184456457490
2013-04-01	66.0142958802621
2013-07-01	66.7085664096369
2013-10-01	67.1740687309397
2014-01-01	67.4356030106288
2014-04-01	68.2309986677963
2014-07-01	69.9467543944282
2014-10-01	70.0600831489212
2015-01-01	70.1792547494475
2015-04-01	70.1300248808577
2015-07-01	69.4470835601943
2015-10-01	69.6070304979034
2016-01-01	70.4219190433407
2016-04-01	71.3699895582982
2016-07-01	73.5492959748878
2016-10-01	72.4771442756996
2017-01-01	70.6640583715943
2017-04-01	73.5045452638066
2017-07-01	73.7663961178293
2017-10-01	73.1174259920435
2018-01-01	73.6088390945530
2018-04-01	75.6527115458060