Quarter	Percent
1999-01-01	35.7183063996152
2000-01-01	36.4829957603962
2001-01-01	37.1316750211531
2002-01-01	37.5523051162541
2003-01-01	37.5002473239548
2003-04-01	37.5390197963726
2003-07-01	37.7642641014774
2003-10-01	37.0597806119771
2004-01-01	37.0642412323828
2004-04-01	37.5554123331905
2004-07-01	37.8895433885377
2004-10-01	37.4041076925583
2005-01-01	37.5776750961692
2005-04-01	37.8695958425438
2005-07-01	37.8731633367022
2005-10-01	37.2386341992530
2006-01-01	37.3912005137821
2006-04-01	37.6588469236149
2006-07-01	38.0235060953049
2006-10-01	38.1107491856678
2007-01-01	37.9687670424288
2007-04-01	38.4798883146657
2007-07-01	38.8223026162168
2007-10-01	38.7306891220179
2008-01-01	38.8252487284377
2008-04-01	39.0335934935512
2008-07-01	39.1004737195415
2008-10-01	38.6656329140068
2009-01-01	38.4751148314272
2009-04-01	38.8090466284439
2009-07-01	38.7754067937244
2009-10-01	38.2467637207802
2010-01-01	38.3754802345567
2010-04-01	38.6419012750915
2010-07-01	38.7457050089840
2010-10-01	38.0944285457928
2011-01-01	38.1073991835297
2011-04-01	38.5681474708819
2011-07-01	38.5903913138984
2011-10-01	38.3347176730555
2012-01-01	38.2273636873240
2012-04-01	38.5387707566309
2012-07-01	38.5568918825950
2012-10-01	38.2447197286306
2013-01-01	38.1124371369081
2013-04-01	38.4936716363897
2013-07-01	38.6898379052369
2013-10-01	38.4206137840058
2014-01-01	38.4334413061184
2014-04-01	38.7152691485660
2014-07-01	38.6122608549958