Quarter	Percent, Seasonally Adjusted
1999-01-01	72.5064588536422
1999-04-01	73.1398077158434
1999-07-01	72.2171197581501
1999-10-01	71.5664898939762
2000-01-01	72.2831966278022
2000-04-01	73.4036107886730
2000-07-01	73.2019460495867
2000-10-01	72.1089830376272
2001-01-01	71.5856523984594
2001-04-01	70.9532035722159
2001-07-01	70.1512944002338
2001-10-01	71.9493885764620
2002-01-01	72.0241445571085
2002-04-01	72.2047866627454
2002-07-01	72.9424448486437
2002-10-01	72.4620680884204
2003-01-01	72.9741398223594
2003-04-01	73.3153623835516
2003-07-01	73.2356325281084
2003-10-01	74.7966124527580
2004-01-01	73.8102754321379
2004-04-01	74.5454406148446
2004-07-01	74.8784069180712
2004-10-01	75.7869754586864
2005-01-01	76.8020421442918
2005-04-01	77.0940145069408
2005-07-01	77.1571009874031
2005-10-01	76.2132610868520
2006-01-01	76.0993259056321
2006-04-01	77.2981406759461
2006-07-01	77.1487696081895
2006-10-01	77.3713921622397
2007-01-01	77.6302715929240
2007-04-01	77.7115710649377
2007-07-01	77.7432680677692
2007-10-01	79.0951190448623
2008-01-01	79.2749016277751
2008-04-01	78.9275839571860
2008-07-01	79.2215871796443
2008-10-01	78.5162553138161
2009-01-01	80.3291738001813
2009-04-01	78.8052834821165
2009-07-01	78.7349354157905
2009-10-01	79.0790529177496
2010-01-01	80.8254763554392
2010-04-01	79.6147153750075
2010-07-01	79.7385631846863
2010-10-01	81.4028701006536
2011-01-01	77.6378832727082
2011-04-01	79.1648004146667
2011-07-01	79.2598174617909
2011-10-01	78.8718028606497
2012-01-01	78.4604930190398
2012-04-01	78.7715377677619
2012-07-01	79.4837502490944
2012-10-01	79.8708778376530
2013-01-01	79.2597023391721
2013-04-01	79.8670987586098
2013-07-01	80.5931199463790
2013-10-01	79.2104538624465
2014-01-01	80.3823561317739
2014-04-01	80.3951686736710
2014-07-01	80.9652572150365
2014-10-01	80.5157143470521
2015-01-01	80.8505141356930
2015-04-01	79.4264969297082
2015-07-01	80.1260546872521
2015-10-01	80.3610588458272
2016-01-01	79.3810656979998
2016-04-01	79.6044612186264
2016-07-01	79.5158868905940
2016-10-01	80.8453939595248
2017-01-01	79.5542965437416
2017-04-01	80.1088550197464
2017-07-01	78.9158080177565
2017-10-01	79.7432949160973
2018-01-01	79.7040167093884
2018-04-01	79.9046890519712