Quarter	Billions of US Dollars
1998-10-01	228.972
1999-01-01	216.383
1999-04-01	212.548
1999-07-01	218.159
1999-10-01	204.754
2000-01-01	200.806
2000-04-01	202.984
2000-07-01	197.445
2000-10-01	213.186
2001-01-01	204.933
2001-04-01	199.192
2001-07-01	214.694
2001-10-01	205.488
2002-01-01	210.655
2002-04-01	241.010
2002-07-01	239.793
2002-10-01	253.917
2003-01-01	267.764
2003-04-01	290.186
2003-07-01	296.135
2003-10-01	325.846
2004-01-01	317.586
2004-04-01	323.858
2004-07-01	335.496
2004-10-01	375.734
2005-01-01	353.317
2005-04-01	341.093
2005-07-01	339.853
2005-10-01	342.077
2006-01-01	353.347
2006-04-01	386.176
2006-07-01	385.789
2006-10-01	407.245
2007-01-01	416.025
2007-04-01	434.960
2007-07-01	458.119
2007-10-01	493.629
2008-01-01	533.918
2008-04-01	550.203
2008-07-01	503.993
2008-10-01	513.777
2009-01-01	509.794
2009-04-01	538.047
2009-07-01	550.179
2009-10-01	545.729
2010-01-01	526.233
2010-04-01	499.356
2010-07-01	558.224
2010-10-01	548.517
2011-01-01	584.440
2011-04-01	601.932
2011-07-01	576.935
2011-10-01	563.690
2012-01-01	591.264
2012-04-01	571.365
2012-07-01	587.656
2012-10-01	609.797
2013-01-01	606.982
2013-04-01	625.294
2013-07-01	639.661
2013-10-01	662.314
2014-01-01	669.396
2014-04-01	671.459
2014-07-01	621.458
2014-10-01	623.725
2015-01-01	571.268
2015-04-01	604.272
2015-07-01	610.562
2015-10-01	598.109
2016-01-01	627.587
2016-04-01	606.105
2016-07-01	606.636
2016-10-01	572.666
2017-01-01	590.671
2017-04-01	624.617
2017-07-01	645.171
2017-10-01	658.363
2018-01-01	677.144