Quarter	Percent, Seasonally Adjusted
2001-01-01	66.0821750625586
2001-04-01	66.2479992174233
2001-07-01	67.1281874250411
2001-10-01	67.3939249985228
2002-01-01	67.6866968513744
2002-04-01	68.2749448527392
2002-07-01	67.9651210825768
2002-10-01	68.0617386525165
2003-01-01	68.1707868715223
2003-04-01	68.6181086226676
2003-07-01	68.8309518229200
2003-10-01	68.5764470269076
2004-01-01	68.7157414823119
2004-04-01	68.9937746446217
2004-07-01	69.3493118677232
2004-10-01	69.4368663682780
2005-01-01	69.6661755282098
2005-04-01	68.9413972800466
2005-07-01	69.5445613037533
2005-10-01	69.9598055319948
2006-01-01	70.5662894780158
2006-04-01	69.5496565206619
2006-07-01	69.1644738747664
2006-10-01	69.3129261349590
2007-01-01	69.3222101456418
2007-04-01	69.9522333355940
2007-07-01	70.4728852270629
2007-10-01	70.0900620187100
2008-01-01	69.8834964019767
2008-04-01	70.3553865836505
2008-07-01	70.1168178072135
2008-10-01	69.8607645184854
2009-01-01	70.0474377440598
2009-04-01	69.5912049783994
2009-07-01	69.8962028555206
2009-10-01	70.3914132778410
2010-01-01	70.1485582399608
2010-04-01	70.1484697514294
2010-07-01	70.6076321812847
2010-10-01	70.8684629397778
2011-01-01	71.4818491325742
2011-04-01	72.1493644740150
2011-07-01	71.9791543731087
2011-10-01	72.4813638874671
2012-01-01	72.3978884033491
2012-04-01	72.9287209475129
2012-07-01	73.0529509622895
2012-10-01	73.4605184903194
2013-01-01	73.0581294006291
2013-04-01	73.2213298176334
2013-07-01	73.7284071249767
2013-10-01	74.3218863808435
2014-01-01	73.8138890320921
2014-04-01	74.2582281334729
2014-07-01	73.8760425290692
2014-10-01	73.9750725702234
2015-01-01	74.4332067087155
2015-04-01	74.2492431525916
2015-07-01	74.2816471971494
2015-10-01	74.8610285259495
2016-01-01	74.8593027560234
2016-04-01	75.3401895511515
2016-07-01	75.9381100325657
2016-10-01	75.8215762968587
2017-01-01	76.1535101225435
2017-04-01	76.6027993296791
2017-07-01	76.5503092609993
2017-10-01	76.4034413699989
2018-01-01	77.5308962008380
2018-04-01	77.5749584838236