Quarter	Percent
1999-07-01	51.3656447632278
1999-10-01	51.2585172933695
2000-01-01	52.9645619389999
2000-04-01	50.6471687973777
2000-07-01	50.4278262587903
2000-10-01	50.8883007224794
2001-01-01	52.5978189185799
2001-04-01	49.7766120707850
2001-07-01	50.0924558813628
2001-10-01	50.1145467634578
2002-01-01	51.4138888388028
2002-04-01	49.1585350527654
2002-07-01	49.7039353195733
2002-10-01	50.2852233344471
2003-01-01	52.3217776007595
2003-04-01	50.3268675862564
2003-07-01	50.4857602096367
2003-10-01	50.6154713279002
2004-01-01	50.9571447881263
2004-04-01	49.1451627324149
2004-07-01	49.5799196437019
2004-10-01	49.7619929456322
2005-01-01	51.0955638780973
2005-04-01	49.0303589047450
2005-07-01	49.3720491352062
2005-10-01	49.4393994135977
2006-01-01	50.6873988977669
2006-04-01	48.7455995361295
2006-07-01	49.2500628036113
2006-10-01	49.3146256503691
2007-01-01	50.7737064589633
2007-04-01	48.7042444444823
2007-07-01	49.2886750363624
2007-10-01	49.4127442130163
2008-01-01	50.9275775686796
2008-04-01	48.8486883475146
2008-07-01	49.5478097564629
2008-10-01	49.8947646099050
2009-01-01	51.9551839974727
2009-04-01	49.9201316671451
2009-07-01	50.1299421394708
2009-10-01	50.7969406071755
2010-01-01	51.8357759511388
2010-04-01	49.4883730430562
2010-07-01	49.7616851950746
2010-10-01	50.6121886445608
2011-01-01	51.7388770326781
2011-04-01	49.0236112508895
2011-07-01	49.7459330231028
2011-10-01	50.2476322151891
2012-01-01	51.2822687083459
2012-04-01	48.7184992453391
2012-07-01	49.3444979043194
2012-10-01	50.1783560053584
2013-01-01	51.5343997830297
2013-04-01	48.8605896732629
2013-07-01	48.9047579468121
2013-10-01	49.3250299598322
2014-01-01	49.9336359445279
2014-04-01	47.7279867197673
2014-07-01	47.8810726163743
2014-10-01	48.4931503045030
2015-01-01	49.3745407113682
2015-04-01	47.5284530583388
2015-07-01	47.5358464240726
2015-10-01	47.9949909686043
2016-01-01	49.0079945168054
2016-04-01	47.3473073085261
2016-07-01	47.2692534923779
2016-10-01	47.7278924749353
2017-01-01	48.4416182172679
2017-04-01	46.7744599076994
2017-07-01	46.8373290901776
2017-10-01	47.3257925668333
2018-01-01	48.2419494131629
2018-04-01	46.4905198726988
2018-07-01	46.5685819164402