Quarter	Billions of US Dollars
1998-10-01	230.009
1999-01-01	217.992
1999-04-01	219.384
1999-07-01	233.447
1999-10-01	225.674
2000-01-01	225.458
2000-04-01	229.658
2000-07-01	215.916
2000-10-01	236.096
2001-01-01	231.326
2001-04-01	228.376
2001-07-01	254.449
2001-10-01	253.795
2002-01-01	259.215
2002-04-01	300.348
2002-07-01	307.930
2002-10-01	338.629
2003-01-01	369.822
2003-04-01	389.097
2003-07-01	400.891
2003-10-01	440.496
2004-01-01	457.432
2004-04-01	460.056
2004-07-01	471.992
2004-10-01	526.767
2005-01-01	500.850
2005-04-01	478.994
2005-07-01	483.001
2005-10-01	489.389
2006-01-01	492.240
2006-04-01	527.656
2006-07-01	531.556
2006-10-01	572.826
2007-01-01	588.419
2007-04-01	606.616
2007-07-01	648.801
2007-10-01	695.793
2008-01-01	761.108
2008-04-01	776.177
2008-07-01	715.717
2008-10-01	711.663
2009-01-01	697.547
2009-04-01	756.871
2009-07-01	785.762
2009-10-01	776.703
2010-01-01	728.640
2010-04-01	669.701
2010-07-01	750.715
2010-10-01	748.792
2011-01-01	791.918
2011-04-01	822.201
2011-07-01	772.224
2011-10-01	721.264
2012-01-01	769.836
2012-04-01	738.117
2012-07-01	770.224
2012-10-01	794.479
2013-01-01	776.969
2013-04-01	795.269
2013-07-01	806.385
2013-10-01	825.519
2014-01-01	840.720
2014-04-01	822.286
2014-07-01	766.478
2014-10-01	734.555
2015-01-01	659.889
2015-04-01	673.601
2015-07-01	680.916
2015-10-01	658.486
2016-01-01	683.624
2016-04-01	668.830
2016-07-01	674.779
2016-10-01	629.252
2017-01-01	640.696
2017-04-01	693.438
2017-07-01	721.505
2017-10-01	727.804
2018-01-01	751.240