Quarter	Percent, Seasonally Adjusted
1999-01-01	48.9226251737463
1999-04-01	49.2134176976018
1999-07-01	49.3467989389639
1999-10-01	49.5571153371883
2000-01-01	49.6227443921028
2000-04-01	49.7547065397379
2000-07-01	50.0282128741795
2000-10-01	50.3970555412766
2001-01-01	49.9720894834074
2001-04-01	49.7100486920157
2001-07-01	49.8226765104784
2001-10-01	49.5725533192335
2002-01-01	49.7988867082044
2002-04-01	49.8633675176339
2002-07-01	49.8231819659474
2002-10-01	49.9761182652326
2003-01-01	50.1729404920158
2003-04-01	50.6772848595458
2003-07-01	50.8018647828786
2003-10-01	50.9211355862962
2004-01-01	50.7713318035684
2004-04-01	50.4787333716137
2004-07-01	50.3381750181840
2004-10-01	50.4735398824488
2005-01-01	50.5169480625735
2005-04-01	50.3935203011965
2005-07-01	50.5930581114634
2005-10-01	50.5839994230261
2006-01-01	50.8540668587210
2006-04-01	50.9863551839105
2006-07-01	50.7829123176192
2006-10-01	50.9959778724106
2007-01-01	50.9534559727091
2007-04-01	50.7969054304714
2007-07-01	50.5921380479734
2007-10-01	50.2654162230055
2008-01-01	50.1119214544836
2008-04-01	49.9400107425546
2008-07-01	50.2298639410138
2008-10-01	49.8936506747615
2009-01-01	49.2202052717214
2009-04-01	49.0009384172718
2009-07-01	48.4420267049550
2009-10-01	48.6313511081092
2010-01-01	48.6479041020772
2010-04-01	48.6133935713579
2010-07-01	48.7950131378245
2010-10-01	48.7785503540102
2011-01-01	48.8291463000576
2011-04-01	49.0878541652066
2011-07-01	49.2204205479672
2011-10-01	49.4280344719879
2012-01-01	49.5516900300026
2012-04-01	49.9808306692943
2012-07-01	50.4700197295590
2012-10-01	50.4868489853793
2013-01-01	50.1404322333870
2013-04-01	51.0028030126819
2013-07-01	51.3592114844941
2013-10-01	52.1206540624858
2014-01-01	53.7973247268708
2014-04-01	53.7146065242922
2014-07-01	54.3893604151052
2014-10-01	54.6979216548428
2015-01-01	55.1032810703854
2015-04-01	55.6528412119387
2015-07-01	56.1925612120436
2015-10-01	56.4829135047461
2016-01-01	57.1995412793888
2016-04-01	57.7966069627497
2016-07-01	58.1392981421718
2016-10-01	58.7231388515896
2017-01-01	58.8008825314187
2017-04-01	59.1745164179330
2017-07-01	59.4087148626774
2017-10-01	59.6804487706999
2018-01-01	60.0409829728202
2018-04-01	60.1637435507996