Quarter	Percent
1999-07-01	63.4192351056667
1999-10-01	61.5941584812876
2000-01-01	56.3275964335855
2000-04-01	61.3278127212631
2000-07-01	61.3848639861810
2000-10-01	59.3371404877576
2001-01-01	54.6860864799796
2001-04-01	61.7697298939782
2001-07-01	61.8500161766516
2001-10-01	60.7195350222309
2002-01-01	57.2086465482305
2002-04-01	62.1376254935000
2002-07-01	62.1575782978109
2002-10-01	60.8592151555362
2003-01-01	55.5236720359507
2003-04-01	60.3337241816898
2003-07-01	60.1333154372354
2003-10-01	59.9530944420794
2004-01-01	57.6912264895463
2004-04-01	61.1805903618460
2004-07-01	60.9080658033268
2004-10-01	60.9020020979015
2005-01-01	57.4524782293122
2005-04-01	61.5174096607084
2005-07-01	60.4616077102536
2005-10-01	59.7103237164315
2006-01-01	56.9939571708761
2006-04-01	61.0166914340762
2006-07-01	59.9366795765112
2006-10-01	61.0952581102399
2007-01-01	58.1157487271380
2007-04-01	62.3502410309179
2007-07-01	61.7382328654717
2007-10-01	61.4021522098554
2008-01-01	58.7385122933902
2008-04-01	62.7861805233248
2008-07-01	62.2327005044467
2008-10-01	61.6180862855658
2009-01-01	58.5257811058826
2009-04-01	62.4714989131350
2009-07-01	62.0971450777198
2009-10-01	61.8018582306962
2010-01-01	59.6407081890941
2010-04-01	63.7903539594910
2010-07-01	63.3434395535831
2010-10-01	63.0139692808436
2011-01-01	60.8817101304293
2011-04-01	65.3731664632987
2011-07-01	64.5728371111859
2011-10-01	64.6442435935097
2012-01-01	62.1804373615894
2012-04-01	66.2711979801973
2012-07-01	65.1959562478652
2012-10-01	65.1236371012791
2013-01-01	62.5895071463298
2013-04-01	67.1196159316572
2013-07-01	66.8090483709377
2013-10-01	66.4921973390919
2014-01-01	65.2638023546373
2014-04-01	68.8069851348975
2014-07-01	67.9583943979530
2014-10-01	67.7071608184936
2015-01-01	66.3617505622168
2015-04-01	68.6059894734250
2015-07-01	68.5418940114045
2015-10-01	68.0287282964068
2016-01-01	66.0368291168746
2016-04-01	68.4885726864461
2016-07-01	68.8629067800907
2016-10-01	68.7869846701653
2017-01-01	67.4578776299624
2017-04-01	69.8737803173429
2017-07-01	69.6430261372762
2017-10-01	69.5698514994240
2018-01-01	67.6220233955530
2018-04-01	69.6779503276551
2018-07-01	69.1933432365996