Quarter	Percent, Seasonally Adjusted
1999-01-01	19.4284233202877
1999-04-01	19.7977463849251
1999-07-01	19.1544956257358
1999-10-01	18.8961745827843
2000-01-01	18.4153097456638
2000-04-01	18.4644162434786
2000-07-01	18.0533362245387
2000-10-01	17.8067435167503
2001-01-01	17.8812720529383
2001-04-01	18.7185515413560
2001-07-01	19.3079460507892
2001-10-01	19.5681702514539
2002-01-01	19.5104572218714
2002-04-01	18.7164792670691
2002-07-01	19.5656125244981
2002-10-01	19.0529250723371
2003-01-01	18.8505181690169
2003-04-01	19.2975728193576
2003-07-01	19.9823730453952
2003-10-01	19.4178199891127
2004-01-01	20.0033262912289
2004-04-01	19.6143627287516
2004-07-01	19.4546450356523
2004-10-01	19.3070231827543
2005-01-01	19.0727020118444
2005-04-01	18.3409978880412
2005-07-01	18.0392574561041
2005-10-01	17.4519880994419
2006-01-01	17.3534694403192
2006-04-01	16.6710176475786
2006-07-01	16.6916177052041
2006-10-01	16.8338855274190
2007-01-01	16.4646517475515
2007-04-01	16.5894345051613
2007-07-01	16.4868203484439
2007-10-01	16.5277627354194
2008-01-01	16.6966279081052
2008-04-01	16.5792333818398
2008-07-01	16.2909367658968
2008-10-01	17.5362909154371
2009-01-01	19.3628523027240
2009-04-01	19.7846353938466
2009-07-01	19.8588547037651
2009-10-01	19.5573227698656
2010-01-01	19.1973680900123
2010-04-01	18.4316219297025
2010-07-01	18.2136200178122
2010-10-01	17.8795961501924
2011-01-01	17.4912092592781
2011-04-01	16.9512494356299
2011-07-01	17.2713610219113
2011-10-01	17.5986156202621
2012-01-01	17.4697777002704
2012-04-01	17.8736092340860
2012-07-01	18.1359189079101
2012-10-01	17.8494832640214
2013-01-01	18.6245355523961
2013-04-01	18.7254623161917
2013-07-01	18.7081148625140
2013-10-01	18.9018132781201
2014-01-01	19.2637166616025
2014-04-01	19.1169168424544
2014-07-01	19.6511782005261
2014-10-01	20.2523453665490
2015-01-01	20.5943550152442
2015-04-01	22.9845053612533
2015-07-01	20.9913507748926
2015-10-01	22.3709702495939
2016-01-01	22.7361032702638
2016-04-01	22.1317017026817
2016-07-01	22.4408546444599
2016-10-01	23.0542683847886
2017-01-01	20.5483264769750
2017-04-01	20.8231074192939
2017-07-01	20.5694052096256
2017-10-01	20.5168675903119
2018-01-01	20.4100597289596
2018-04-01	19.6765816163833