Quarter	Percent, Seasonally Adjusted
1999-04-01	77.2331846133220
1999-07-01	77.6415858637006
1999-10-01	77.6851459886896
2000-01-01	77.6051156426926
2000-04-01	77.8813782567318
2000-07-01	77.9753467682353
2000-10-01	77.7689506112455
2001-01-01	78.0912836055750
2001-04-01	78.1533302842486
2001-07-01	77.9820065827308
2001-10-01	77.8457673865360
2002-01-01	77.6767408730577
2002-04-01	77.5992561349290
2002-07-01	77.5612505141268
2002-10-01	77.8577005681858
2003-01-01	77.7738403113769
2003-04-01	77.8559093886526
2003-07-01	77.9019493827778
2003-10-01	77.7966903911178
2004-01-01	78.1019921417772
2004-04-01	77.9300230421201
2004-07-01	77.7706325426824
2004-10-01	77.9244727768476
2005-01-01	78.1262151633657
2005-04-01	77.7037597555248
2005-07-01	77.7307254368929
2005-10-01	77.5944561752377
2006-01-01	77.4976965211397
2006-04-01	77.4756510983784
2006-07-01	77.7692997374177
2006-10-01	77.4898254654538
2007-01-01	77.4016313700599
2007-04-01	77.5986927860297
2007-07-01	77.5393229253544
2007-10-01	77.8295156607588
2008-01-01	77.8094376911292
2008-04-01	77.7042112121611
2008-07-01	77.1064969756867
2008-10-01	76.7952785703898
2009-01-01	76.0489172190921
2009-04-01	74.7943357000877
2009-07-01	74.4449401228169
2009-10-01	74.2207724268744
2010-01-01	73.7719563135160
2010-04-01	74.4077276191942
2010-07-01	74.9208642503186
2010-10-01	74.5747180759991
2011-01-01	74.4863652323085
2011-04-01	74.4579773597884
2011-07-01	74.0755959192289
2011-10-01	74.1850355230820
2012-01-01	74.5089680290510
2012-04-01	75.0075269383059
2012-07-01	75.2322094484082
2012-10-01	75.2509283575955
2013-01-01	74.9006637138399
2013-04-01	75.1106401507847
2013-07-01	75.6926434663596
2013-10-01	75.8768826531038
2014-01-01	76.3739172776495
2014-04-01	76.8492486953382
2014-07-01	77.0171330003305
2014-10-01	76.9625804682764
2015-01-01	77.3804127429169
2015-04-01	77.1698982771030
2015-07-01	77.4766628568504
2015-10-01	78.1974689204849
2016-01-01	78.3002656994845
2016-04-01	78.3704735066425
2016-07-01	78.1214005224359
2016-10-01	78.2100757104754
2017-01-01	78.3874113068975
2017-04-01	78.7637411881215
2017-07-01	78.3991983793994
2017-10-01	78.7910962075551
2018-01-01	79.1494567538556
2018-04-01	79.2347972199941