Quarter	Percent, Seasonally Adjusted
1998-01-01	42.8225506823865
1998-04-01	37.5163938508613
1998-07-01	43.8280108773835
1998-10-01	45.8204733247529
1999-01-01	46.1713482378560
1999-04-01	51.1702036727034
1999-07-01	49.8158409830803
1999-10-01	49.1846183948155
2000-01-01	50.7576006833741
2000-04-01	51.8245613040818
2000-07-01	51.0719342578944
2000-10-01	50.3732567150418
2001-01-01	50.7420580850416
2001-04-01	51.1811787199364
2001-07-01	50.6198035724427
2001-10-01	50.9171620305273
2002-01-01	50.3571463825402
2002-04-01	50.8626360431596
2002-07-01	51.2006629216919
2002-10-01	50.9856431097260
2003-01-01	51.5756782399696
2003-04-01	50.6387905255550
2003-07-01	49.8415496540315
2003-10-01	47.8966603309774
2004-01-01	47.5369273481489
2004-04-01	48.9424384106001
2004-07-01	49.6207117945779
2004-10-01	49.4989186312918
2005-01-01	50.6270776993483
2005-04-01	50.1733568830628
2005-07-01	49.7429707500662
2005-10-01	51.1804390824373
2006-01-01	50.6723444912155
2006-04-01	51.0586048658491
2006-07-01	50.8948958837092
2006-10-01	51.4889587959298
2007-01-01	52.1853739673661
2007-04-01	52.1692056257547
2007-07-01	55.0244991103874
2007-10-01	54.9636881161017
2008-01-01	53.6135136827120
2008-04-01	53.6114254650881
2008-07-01	53.1423133539296
2008-10-01	53.6757527424386
2009-01-01	52.7843872604816
2009-04-01	53.0775826223660
2009-07-01	48.6338848227025
2009-10-01	50.1839976829678
2010-01-01	48.8478929451741
2010-04-01	49.1669608206696
2010-07-01	49.0979451766355
2010-10-01	50.2108040569802
2011-01-01	50.3798144288045
2011-04-01	50.9001359595124
2011-07-01	51.4875893483997
2011-10-01	49.2842248141308
2012-01-01	50.3395078470622
2012-04-01	51.7502449403745
2012-07-01	52.9533662812262
2012-10-01	53.0644761920503
2013-01-01	54.5260368693130
2013-04-01	53.3402853535351
2013-07-01	49.9008393546949
2013-10-01	53.8039317691660
2014-01-01	52.2638416402094
2014-04-01	53.5156226407299
2014-07-01	52.3027688252523
2014-10-01	52.3518485277163
2015-01-01	53.4275804019580
2015-04-01	53.3019562536246
2015-07-01	53.3710669972516
2015-10-01	53.0946891910237
2016-01-01	52.9067158775152
2016-04-01	52.3089690580811
2016-07-01	54.3152254319791
2016-10-01	53.0535087799429
2017-01-01	54.1565566002481
2017-04-01	53.3022950676866
2017-07-01	54.2146232127947
2017-10-01	54.9754587153387
2018-01-01	55.3682268954305
2018-04-01	56.3690173335016