Quarter	Percent
2005-01-01	18.4357024640348
2005-04-01	21.2103998769245
2005-07-01	21.9893947705248
2005-10-01	17.3097332178538
2006-01-01	18.4117905851298
2006-04-01	20.6327516125670
2006-07-01	19.0578653895097
2006-10-01	15.1256586002704
2007-01-01	16.3383249784476
2007-04-01	17.4730534798030
2007-07-01	18.8338146730248
2007-10-01	18.7221011107651
2008-01-01	18.8956275066028
2008-04-01	20.7470709276446
2008-07-01	20.2582845497177
2008-10-01	18.9996925284411
2009-01-01	20.9505481218765
2009-04-01	24.7794884764946
2009-07-01	23.9045810838045
2009-10-01	20.7638801854869
2010-01-01	20.2070179433065
2010-04-01	18.6179213356396
2010-07-01	17.5652270047170
2010-10-01	17.7803736168725
2011-01-01	16.6848744516327
2011-04-01	17.6478220574606
2011-07-01	17.9984968805744
2011-10-01	17.8385440293226
2012-01-01	16.5184645499952
2012-04-01	15.9863453868287
2012-07-01	15.8531098093319
2012-10-01	16.6662840314585
2013-01-01	16.3790292354793
2013-04-01	16.4809219078189
2013-07-01	14.3457181139922
2013-10-01	16.9818516087918
2014-01-01	17.2660925625978
2014-04-01	15.8234122178011
2014-07-01	16.5602754978503
2014-10-01	16.1233429938323
2015-01-01	14.7524837213510
2015-04-01	16.5024386359149
2015-07-01	15.3911252352078
2015-10-01	15.3714645595903
2016-01-01	14.9319034944892
2016-04-01	17.1550097432631
2016-07-01	15.8067013421573
2016-10-01	14.7643562051107
2017-01-01	15.8600148188676
2017-04-01	17.1845033028263
2017-07-01	17.5019358051854
2017-10-01	16.8626404462344
2018-01-01	16.2836362817509
2018-04-01	18.2440180619322
2018-07-01	18.0927209264964