Quarter	Percent
2005-01-01	21.0550792952005
2005-04-01	20.6017722177965
2005-07-01	19.2910530303801
2005-10-01	18.9824781007806
2006-01-01	18.2515907508950
2006-04-01	17.9394597437357
2006-07-01	18.2104270100248
2006-10-01	18.3062834735303
2007-01-01	19.8614994424449
2007-04-01	19.1181214530661
2007-07-01	20.5769812782687
2007-10-01	19.5392227304324
2008-01-01	19.7096668014960
2008-04-01	19.8293311522869
2008-07-01	21.2121691117512
2008-10-01	22.0856382297825
2009-01-01	21.4849284449673
2009-04-01	22.0398353254895
2009-07-01	21.0909878864938
2009-10-01	20.7631971919260
2010-01-01	21.9234139440318
2010-04-01	21.1465622615650
2010-07-01	21.9338856672539
2010-10-01	23.4677321703148
2011-01-01	23.0877974777558
2011-04-01	22.8815445854598
2011-07-01	22.1885881547548
2011-10-01	22.2998702443795
2012-01-01	22.0176431845981
2012-04-01	20.7350944059651
2012-07-01	20.4816765431990
2012-10-01	21.6865593182154
2013-01-01	22.5484957905937
2013-04-01	21.7959830731044
2013-07-01	22.0198521148729
2013-10-01	20.8776308218902
2014-01-01	21.7585521259500
2014-04-01	21.2858960815856
2014-07-01	20.4798902097241
2014-10-01	21.0703262011306
2015-01-01	21.1875066259477
2015-04-01	22.0262240999142
2015-07-01	21.4810535659734
2015-10-01	22.7153473216063
2016-01-01	23.1112185289934
2016-04-01	22.3307193884853
2016-07-01	22.3301523401517
2016-10-01	21.1445893836597
2017-01-01	21.7915923212040
2017-04-01	21.4559114507764
2017-07-01	21.3506199718154
2017-10-01	22.5244565183393
2018-01-01	22.0228060486157
2018-04-01	22.1755413960788