Quarter	Percent, Seasonally Adjusted
2001-01-01	63.1016892131716
2001-04-01	63.6042341114798
2001-07-01	64.6916558296348
2001-10-01	64.6731774012205
2002-01-01	65.3540856558234
2002-04-01	65.7333837791634
2002-07-01	65.4705020707343
2002-10-01	65.7062464777227
2003-01-01	65.9575783050187
2003-04-01	66.3308106597870
2003-07-01	66.5872793633608
2003-10-01	66.3713508675129
2004-01-01	66.2947461584619
2004-04-01	66.9206311012091
2004-07-01	67.0930084103309
2004-10-01	67.5928342683204
2005-01-01	66.9362775150874
2005-04-01	66.1247603464456
2005-07-01	66.3031258173806
2005-10-01	67.2694456254196
2006-01-01	68.0775017252619
2006-04-01	66.8312959136748
2006-07-01	66.3096205009152
2006-10-01	66.5652473404148
2007-01-01	66.2684679810829
2007-04-01	67.0766279902618
2007-07-01	67.7184689880515
2007-10-01	66.8665558596246
2008-01-01	66.0275199257643
2008-04-01	66.8751592264101
2008-07-01	67.0511137512269
2008-10-01	66.7945914285358
2009-01-01	67.0139489189536
2009-04-01	66.6603306236672
2009-07-01	66.4360727875394
2009-10-01	66.7818220269592
2010-01-01	66.6769055171802
2010-04-01	66.4932922524244
2010-07-01	66.9297699517831
2010-10-01	67.3239768114066
2011-01-01	68.5530955453089
2011-04-01	68.8510569670154
2011-07-01	68.8388999387150
2011-10-01	69.2537592992294
2012-01-01	68.8836980622444
2012-04-01	69.5515252005306
2012-07-01	69.7424119020752
2012-10-01	70.3383945003579
2013-01-01	69.6573189573489
2013-04-01	69.9433502559709
2013-07-01	70.3025950392472
2013-10-01	71.2134466022136
2014-01-01	71.4250630469639
2014-04-01	71.6330802749956
2014-07-01	71.6884519787232
2014-10-01	71.2571414364333
2015-01-01	71.8396587160406
2015-04-01	71.7525703080529
2015-07-01	72.1434688251132
2015-10-01	72.5474988007880
2016-01-01	72.4623023326347
2016-04-01	73.7746442836236
2016-07-01	73.7812843499346
2016-10-01	73.9891257413339
2017-01-01	74.4864402058376
2017-04-01	74.4543923962162
2017-07-01	74.6145862140322
2017-10-01	74.2078169411796
2018-01-01	75.4283891245093
2018-04-01	75.2912660362839