Quarter	Percent, Seasonally Adjusted
1999-01-01	47.3146560720112
1999-04-01	46.6857064847433
1999-07-01	46.8249664232951
1999-10-01	46.3394475289229
2000-01-01	46.2979631401306
2000-04-01	45.5590919981213
2000-07-01	46.0536222842770
2000-10-01	46.0431997507017
2001-01-01	45.7675100255343
2001-04-01	46.0161877652698
2001-07-01	45.8190410940522
2001-10-01	44.5761305503430
2002-01-01	44.0210413990027
2002-04-01	43.5786594916847
2002-07-01	42.9569428427126
2002-10-01	42.8554593663754
2003-01-01	41.9655901439451
2003-04-01	41.4054635231227
2003-07-01	40.8967422509207
2003-10-01	40.0461243961852
2004-01-01	40.0823221874480
2004-04-01	39.8754143795543
2004-07-01	39.0269983102671
2004-10-01	38.2269844933644
2005-01-01	37.5744375322002
2005-04-01	36.8431721786972
2005-07-01	35.8953387608920
2005-10-01	36.2693959995692
2006-01-01	35.8678643404094
2006-04-01	35.7049500337779
2006-07-01	35.2623559799360
2006-10-01	34.5456560968614
2007-01-01	34.5282059321624
2007-04-01	34.5624327475425
2007-07-01	34.7525979439216
2007-10-01	34.6572312929246
2008-01-01	34.1072119566471
2008-04-01	32.5753592633770
2008-07-01	31.6579542593775
2008-10-01	31.2207791282856
2009-01-01	30.8875633144432
2009-04-01	30.7077501838656
2009-07-01	31.9287545265520
2009-10-01	32.0712997314997
2010-01-01	30.9394663764041
2010-04-01	30.9390812664839
2010-07-01	31.2565723296275
2010-10-01	31.1499134702091
2011-01-01	30.5362033368965
2011-04-01	30.7787463150303
2011-07-01	29.2286899867204
2011-10-01	29.7374630447158
2012-01-01	30.1221314472430
2012-04-01	30.1160777592637
2012-07-01	31.0199344899209
2012-10-01	30.7085757146346
2013-01-01	31.3407972564142
2013-04-01	31.2676848974792
2013-07-01	30.6493437703222
2013-10-01	29.8177828657223
2014-01-01	30.7340834342138
2014-04-01	30.7859381969666
2014-07-01	31.1562700031091
2014-10-01	31.2260433234435
2015-01-01	32.0583486912987
2015-04-01	31.4374081980013
2015-07-01	31.8834332559412
2015-10-01	31.4954766414785
2016-01-01	31.6258713318045
2016-04-01	31.4518540669532
2016-07-01	32.8098475657641
2016-10-01	33.7724404555086
2017-01-01	33.5854714891071
2017-04-01	33.6063171357262
2017-07-01	32.4442373865847
2017-10-01	33.0832842372122
2018-01-01	32.0913625342090
2018-04-01	32.7880013630172