Quarter	Percent
2005-01-01	19.7415737061222
2005-04-01	20.1723566710549
2005-07-01	19.2750015081437
2005-10-01	19.5804610427492
2006-01-01	19.6118615021595
2006-04-01	19.3076043054730
2006-07-01	19.0364117442696
2006-10-01	19.1518351585488
2007-01-01	20.0304363670987
2007-04-01	19.8086776125359
2007-07-01	19.7308590501648
2007-10-01	19.1429370723420
2008-01-01	20.0647986438371
2008-04-01	19.7284278740603
2008-07-01	19.5780696867378
2008-10-01	20.7760966713163
2009-01-01	21.2612031230195
2009-04-01	21.3046639941952
2009-07-01	20.7304388620069
2009-10-01	20.6231701553260
2010-01-01	21.6294293653516
2010-04-01	20.6699976194168
2010-07-01	20.8921217204629
2010-10-01	21.9299358646794
2011-01-01	22.2695212386856
2011-04-01	21.6593874145133
2011-07-01	21.0443208721638
2011-10-01	21.1218943791491
2012-01-01	21.7317152580269
2012-04-01	20.8290157611536
2012-07-01	20.4989145244216
2012-10-01	21.7290878441193
2013-01-01	22.3164225688578
2013-04-01	21.3694012352621
2013-07-01	21.2592028843839
2013-10-01	21.0958201582875
2014-01-01	21.8360813204018
2014-04-01	21.8267400210633
2014-07-01	21.3517407883887
2014-10-01	21.9547487420966
2015-01-01	22.3622204348909
2015-04-01	22.0599442970589
2015-07-01	21.8210968973391
2015-10-01	21.8142499925594
2016-01-01	22.8527680744650
2016-04-01	22.4108600674975
2016-07-01	21.7820186750849
2016-10-01	22.0774103350876
2017-01-01	22.5552066390484
2017-04-01	22.3727569131068
2017-07-01	22.1927256067126
2017-10-01	22.5557919448922
2018-01-01	22.9095635609297
2018-04-01	22.4887063965264