Quarter	Billions of US Dollars
2002-01-01	91.430
2002-04-01	109.252
2002-07-01	109.768
2002-10-01	115.411
2003-01-01	114.612
2003-04-01	124.601
2003-07-01	130.024
2003-10-01	154.998
2004-01-01	148.448
2004-04-01	144.312
2004-07-01	160.108
2004-10-01	188.012
2005-01-01	177.318
2005-04-01	167.422
2005-07-01	182.664
2005-10-01	187.737
2006-01-01	218.693
2006-04-01	253.651
2006-07-01	268.034
2006-10-01	289.016
2007-01-01	306.617
2007-04-01	323.044
2007-07-01	352.121
2007-10-01	369.478
2008-01-01	435.172
2008-04-01	445.629
2008-07-01	432.891
2008-10-01	453.760
2009-01-01	443.323
2009-04-01	466.354
2009-07-01	487.658
2009-10-01	491.830
2010-01-01	475.434
2010-04-01	439.466
2010-07-01	466.203
2010-10-01	461.590
2011-01-01	500.456
2011-04-01	512.390
2011-07-01	495.546
2011-10-01	484.973
2012-01-01	505.376
2012-04-01	493.374
2012-07-01	510.788
2012-10-01	498.264
2013-01-01	468.448
2013-04-01	463.402
2013-07-01	475.881
2013-10-01	503.933
2014-01-01	510.982
2014-04-01	530.660
2014-07-01	501.318
2014-10-01	520.496
2015-01-01	749.883
2015-04-01	759.424
2015-07-01	753.857
2015-10-01	764.632
2016-01-01	797.494
2016-04-01	783.346
2016-07-01	737.727
2016-10-01	714.735
2017-01-01	699.217
2017-04-01	725.708
2017-07-01	741.649
2017-10-01	738.111
2018-01-01	726.353