Quarter	Percent, Seasonally Adjusted
1999-01-01	55.4951383536178
1999-04-01	55.4461859227935
1999-07-01	55.6996382152135
1999-10-01	55.8135563490381
2000-01-01	56.4953878818366
2000-04-01	56.2434288452584
2000-07-01	56.3970192881334
2000-10-01	56.6372680705361
2001-01-01	57.0343626278738
2001-04-01	56.9704257923922
2001-07-01	57.0950826975748
2001-10-01	56.7444436397055
2002-01-01	56.3647001246706
2002-04-01	56.4446845633903
2002-07-01	56.6654305840074
2002-10-01	56.5860441828817
2003-01-01	56.5787802315306
2003-04-01	56.7283774729220
2003-07-01	57.0684094265850
2003-10-01	57.0034931395122
2004-01-01	56.7502555677670
2004-04-01	56.7494546098066
2004-07-01	56.7457474106871
2004-10-01	56.3071170134573
2005-01-01	55.9490506895207
2005-04-01	55.2607612537427
2005-07-01	55.0917870481143
2005-10-01	55.2954830341479
2006-01-01	54.6753863190422
2006-04-01	54.8861254533503
2006-07-01	55.0494671133941
2006-10-01	54.9589433272319
2007-01-01	54.7774749549014
2007-04-01	54.7344593449481
2007-07-01	54.6316939115564
2007-10-01	55.0789547337024
2008-01-01	55.2327992180561
2008-04-01	55.2015804076513
2008-07-01	55.6991753861812
2008-10-01	55.0782161049472
2009-01-01	54.3068942338686
2009-04-01	54.4184131574433
2009-07-01	54.8091833693421
2009-10-01	54.9260868424380
2010-01-01	55.0271317009208
2010-04-01	55.0249591726860
2010-07-01	55.3881156438408
2010-10-01	55.3385972879205
2011-01-01	54.5697703301300
2011-04-01	54.3712493679485
2011-07-01	54.6888536252084
2011-10-01	54.8858972965762
2012-01-01	55.2487810296188
2012-04-01	55.3727387383387
2012-07-01	55.4167594379509
2012-10-01	55.0167596691537
2013-01-01	55.6969177234313
2013-04-01	55.4086467013280
2013-07-01	55.7292479095215
2013-10-01	55.8121002159345
2014-01-01	55.7182700307319
2014-04-01	55.6051855501938
2014-07-01	55.7710467069434
2014-10-01	56.1462201600679
2015-01-01	56.5083752710372
2015-04-01	56.5128624441170
2015-07-01	56.9572824101191
2015-10-01	57.4572308915861
2016-01-01	57.4985330613569
2016-04-01	57.6638032935195
2016-07-01	57.6759145662895
2016-10-01	57.6276442139092
2017-01-01	57.6967038991930
2017-04-01	57.7644107249074
2017-07-01	58.0837467291256
2017-10-01	57.9800830649094
2018-01-01	57.5735456872816
2018-04-01	57.3147088509732