Quarter	Percent, Seasonally Adjusted
1999-01-01	73.6345977414036
1999-04-01	73.3814570331468
1999-07-01	73.4259519256145
1999-10-01	73.2693243282554
2000-01-01	73.9338686742636
2000-04-01	74.0402872891538
2000-07-01	73.9573460888932
2000-10-01	73.0356821161153
2001-01-01	73.1947787927555
2001-04-01	72.9920229521986
2001-07-01	73.6401261991756
2001-10-01	72.8869123022734
2002-01-01	73.0271837406151
2002-04-01	73.0154196854456
2002-07-01	73.1679939517878
2002-10-01	73.4716945256967
2003-01-01	72.1739855361851
2003-04-01	72.9896006815929
2003-07-01	72.8017350493263
2003-10-01	73.5471039570266
2004-01-01	73.6147149626871
2004-04-01	73.1170233803683
2004-07-01	73.5945095372936
2004-10-01	73.2906188572615
2005-01-01	74.1315524960793
2005-04-01	73.6088604536231
2005-07-01	74.2851144857606
2005-10-01	73.6896856928688
2006-01-01	73.3443924466442
2006-04-01	73.2641331645972
2006-07-01	72.7513940776016
2006-10-01	74.2034323223618
2007-01-01	74.1355249922672
2007-04-01	73.6403311033101
2007-07-01	73.5931684056274
2007-10-01	73.1842288519396
2008-01-01	73.7097391896183
2008-04-01	73.1492157377040
2008-07-01	73.6466692201202
2008-10-01	72.8616327650494
2009-01-01	73.1176614465646
2009-04-01	72.7239745755374
2009-07-01	72.5059757051877
2009-10-01	73.0223915542770
2010-01-01	73.1763666012580
2010-04-01	73.6095671618777
2010-07-01	73.6265415276813
2010-10-01	73.3849539326420
2011-01-01	71.9732382604565
2011-04-01	72.7219967539524
2011-07-01	71.9324498646008
2011-10-01	72.5482043550433
2012-01-01	72.2494090709314
2012-04-01	72.4759700254820
2012-07-01	72.4766288903255
2012-10-01	72.6934809198679
2013-01-01	72.4545303017672
2013-04-01	73.3873165701891
2013-07-01	72.7112804280431
2013-10-01	72.3350561902056
2014-01-01	72.7508958065697
2014-04-01	72.5092389256893
2014-07-01	72.0513442685796
2014-10-01	72.4709796140826
2015-01-01	72.6817444274266
2015-04-01	72.1197239772992
2015-07-01	72.1586896017050
2015-10-01	71.7268020473784
2016-01-01	72.0236896209116
2016-04-01	72.5868265076722
2016-07-01	72.1667936700933
2016-10-01	72.6079184267435
2017-01-01	72.4308063047287
2017-04-01	72.5318520726555
2017-07-01	73.0689925976631
2017-10-01	73.0482987206190
2018-01-01	72.7384806127997
2018-04-01	72.6821979881172