Quarter	Percent
2005-01-01	38.0255494766566
2005-04-01	37.9053175806955
2005-07-01	37.4658091795360
2005-10-01	38.7397464578673
2006-01-01	38.7815989691987
2006-04-01	38.9215047991076
2006-07-01	38.4126606595618
2006-10-01	40.4653988387902
2007-01-01	40.3513684532078
2007-04-01	39.9646862862047
2007-07-01	39.7857047011507
2007-10-01	41.6400138932104
2008-01-01	41.9183240251699
2008-04-01	41.6980471380471
2008-07-01	41.3997631764407
2008-10-01	43.2497948632690
2009-01-01	41.9673599292109
2009-04-01	41.6848281345392
2009-07-01	41.5027188747333
2009-10-01	43.5523612152211
2010-01-01	45.0641778958222
2010-04-01	45.8200983960221
2010-07-01	47.2926060970304
2010-10-01	48.4385677428352
2011-01-01	48.1814829887960
2011-04-01	49.0771800451880
2011-07-01	49.1456920627418
2011-10-01	50.0800383219005
2012-01-01	49.8170416554339
2012-04-01	49.9829509680359
2012-07-01	50.3119032517707
2012-10-01	50.7086138874820
2013-01-01	50.7203778549249
2013-04-01	50.9041704631216
2013-07-01	50.5352669804186
2013-10-01	51.7219953219163
2014-01-01	51.5365888986956
2014-04-01	51.3098824434751
2014-07-01	51.6888971435322
2014-10-01	52.2350319588178
2015-01-01	51.1129543231683
2015-04-01	51.3405333365836
2015-07-01	52.0241173959642
2015-10-01	53.0988435374278
2016-01-01	51.2813691967382
2016-04-01	51.8292472554432
2016-07-01	51.9677015131303
2016-10-01	53.0535079266471
2017-01-01	51.7171632968108
2017-04-01	52.3310386335605
2017-07-01	53.1920722966075
2017-10-01	53.9198905790565
2018-01-01	53.3103225323815
2018-04-01	52.9988349939182
2018-07-01	52.7056164675431