Quarter	Percent
1999-07-01	54.3678839146521
1999-10-01	55.9446373398578
2000-01-01	54.0594917742196
2000-04-01	56.5135479516096
2000-07-01	56.5239640482756
2000-10-01	57.1853301918352
2001-01-01	55.1264188291251
2001-04-01	57.7072539670936
2001-07-01	56.8846040079536
2001-10-01	57.6251417655698
2002-01-01	56.2520423713223
2002-04-01	58.5980031331646
2002-07-01	58.0377686505988
2002-10-01	58.1613890059263
2003-01-01	55.7322716324297
2003-04-01	57.4784629020682
2003-07-01	56.8512410061224
2003-10-01	57.5395035503812
2004-01-01	57.1908783531216
2004-04-01	58.8358835833224
2004-07-01	58.0720854486122
2004-10-01	58.6222000488950
2005-01-01	57.2008661250026
2005-04-01	58.8583281315520
2005-07-01	58.6901533233746
2005-10-01	59.8518910304558
2006-01-01	58.9596797047358
2006-04-01	60.6127171043665
2006-07-01	60.0188169133939
2006-10-01	60.4903786828454
2007-01-01	59.5180124541583
2007-04-01	60.9962767996709
2007-07-01	60.3937793744383
2007-10-01	61.1731877405471
2008-01-01	59.9191768612322
2008-04-01	61.4381483189214
2008-07-01	60.6586376003909
2008-10-01	61.2802733383713
2009-01-01	59.2469047918407
2009-04-01	60.0503805306480
2009-07-01	59.8286108365380
2009-10-01	60.2849923294310
2010-01-01	59.1602124867981
2010-04-01	60.9584414457223
2010-07-01	60.4797225351340
2010-10-01	60.8146130598919
2011-01-01	59.7058861115572
2011-04-01	61.8439716312057
2011-07-01	60.8819839919624
2011-10-01	61.3762437214183
2012-01-01	60.2906920445528
2012-04-01	61.8293147057272
2012-07-01	61.3872322293657
2012-10-01	61.3165734129634
2013-01-01	60.2327153397105
2013-04-01	62.1046933826116
2013-07-01	62.2895816627697
2013-10-01	62.5220063565932
2014-01-01	61.7908305302882
2014-04-01	62.8983113043736
2014-07-01	62.8487175864877
2014-10-01	63.1030385455936
2015-01-01	62.4231494872286
2015-04-01	63.2627263744497
2015-07-01	63.5105721418325
2015-10-01	64.0230557773902
2016-01-01	63.1625549500401
2016-04-01	63.9090453511013
2016-07-01	64.0689453437016
2016-10-01	64.2667654102376
2017-01-01	63.8233406587903
2017-04-01	64.5713637716737
2017-07-01	64.6309141819772
2017-10-01	64.8320689520712
2018-01-01	64.2533673287293
2018-04-01	65.3047761678155
2018-07-01	65.2312315636450