Quarter	Percent
2005-01-01	14.0581844858257
2005-04-01	13.3285532726523
2005-07-01	13.1814465429736
2005-10-01	12.5979630182255
2006-01-01	13.1899665056852
2006-04-01	12.2934228136510
2006-07-01	12.5921711846703
2006-10-01	11.8862713449138
2007-01-01	12.2984900371395
2007-04-01	11.6356611347755
2007-07-01	11.9887169951689
2007-10-01	11.4719724347170
2008-01-01	12.2079332562034
2008-04-01	12.2549274284667
2008-07-01	13.0002154459727
2008-10-01	13.3827973831087
2009-01-01	15.8258198342222
2009-04-01	16.6278267712946
2009-07-01	17.1256912734616
2009-10-01	16.5754682160316
2010-01-01	17.5674809375463
2010-04-01	16.8578488653227
2010-07-01	16.6419357747250
2010-10-01	16.0937212354574
2011-01-01	16.7880224146462
2011-04-01	16.2492055373707
2011-07-01	16.5131860577395
2011-10-01	15.7374336015890
2012-01-01	16.6922184190358
2012-04-01	16.2442196239454
2012-07-01	16.3210561144227
2012-10-01	16.0081185790035
2013-01-01	17.0008695851133
2013-04-01	16.2763063341802
2013-07-01	16.2149810989265
2013-10-01	15.2287182287006
2014-01-01	16.0396299311985
2014-04-01	14.9879145862406
2014-07-01	15.1795835153628
2014-10-01	14.2927514200661
2015-01-01	14.7237017930456
2015-04-01	14.0911561428778
2015-07-01	13.7619612470018
2015-10-01	13.0499650014472
2016-01-01	13.4260700247227
2016-04-01	13.0327122774351
2016-07-01	13.0153652335724
2016-10-01	12.3843845220566
2017-01-01	12.6108013721318
2017-04-01	11.9583156779026
2017-07-01	11.9074581193345
2017-10-01	11.2473622284679
2018-01-01	11.4137634784790
2018-04-01	10.9415279375806