Quarter	Percent, Seasonally Adjusted
1999-04-01	56.1070335384919
2000-04-01	55.8281807177675
2001-04-01	56.7938931297710
2002-04-01	57.4657292368936
2003-04-01	56.7934609757649
2004-04-01	56.2949186735594
2005-04-01	56.3179602549681
2006-04-01	56.9484906712949
2007-04-01	57.2341536854395
2008-04-01	58.8631604503657
2009-04-01	58.7816195180362
2010-01-01	56.6359077826900
2010-04-01	56.6362775278238
2010-07-01	56.6901928358385
2010-10-01	56.8616489142588
2011-01-01	57.1621462956440
2011-04-01	57.7190053598102
2011-07-01	56.9280625948850
2011-10-01	57.7755790944011
2012-01-01	57.9626554807888
2012-04-01	57.9420230860931
2012-07-01	58.1653664336881
2012-10-01	57.7536860364267
2013-01-01	57.8011014676624
2013-04-01	58.0346355215465
2013-07-01	58.1645533306558
2013-10-01	58.5381888863480
2014-01-01	57.9867149414146
2014-04-01	58.6907064042771
2014-07-01	58.5779517286366
2014-10-01	60.0033919384928