Quarter	Percent
1999-01-01	11.54654589581350
2000-01-01	15.24728093576850
2000-04-01	14.58895600394120
2000-07-01	13.60582544913360
2000-10-01	14.19605340141480
2001-01-01	16.96564661742290
2001-04-01	16.95409045311930
2001-07-01	16.30853468309300
2001-10-01	17.26408428085050
2002-01-01	19.64033964335300
2002-04-01	19.22617959771660
2002-07-01	18.55383562815360
2002-10-01	19.02751147209000
2003-01-01	20.25103590780700
2003-04-01	18.89451301505400
2003-07-01	18.29216700836340
2003-10-01	18.39372334537880
2004-01-01	20.16161440627340
2004-04-01	18.49132539294070
2004-07-01	17.40426681069400
2004-10-01	16.68150468201950
2005-01-01	17.87833827893180
2005-04-01	17.15634104127030
2005-07-01	15.93340252917880
2005-10-01	15.40203970946370
2006-01-01	15.50762082591520
2006-04-01	13.39590166596300
2006-07-01	11.96991518642980
2006-10-01	10.96655672894080
2007-01-01	10.70373908889560
2007-04-01	9.15205981113417
2007-07-01	8.36973917556988
2007-10-01	7.76339911571228
2008-01-01	7.56365990504963
2008-04-01	6.53773137161842
2008-07-01	5.66368465493101
2008-10-01	5.96677301294295
2009-01-01	7.73085182534002
2009-04-01	7.48428607831479
2009-07-01	7.61404866215665
2009-10-01	8.20488473914649
2010-01-01	10.54047705481650
2010-04-01	9.27098916722369
2010-07-01	8.64516671395395
2010-10-01	8.85592505064146
2011-01-01	9.96178343949045
2011-04-01	8.94897422409258
2011-07-01	8.29960572689528
2011-10-01	8.83840503672613
2012-01-01	10.13170262877180
2012-04-01	9.22122558470953
2012-07-01	8.99834635105199
2012-10-01	9.33508777426194
2013-01-01	10.77189848142500
2013-04-01	9.81943429704624
2013-07-01	9.02766222961730
2013-10-01	9.13360950707172
2014-01-01	10.27237190974730
2014-04-01	8.68372180372681
2014-07-01	7.48066149592519
2014-10-01	7.57092198581560
2015-01-01	8.50891835427756
2015-04-01	7.35393305792092
2015-07-01	6.70899624853215
2015-10-01	6.76379635971193
2016-01-01	6.97065376939079
2016-04-01	6.29825873529195
2016-07-01	5.73330537792221
2016-10-01	5.43623880097128
2017-01-01	5.40917005223448
2017-04-01	5.16235160989512
2017-07-01	4.54621270562725
2017-10-01	4.36977972270729
2018-01-01	4.07212317666126
2018-04-01	3.70896447916556