Quarter	Billions of US Dollars
1999-10-01	224.842
2000-01-01	221.768
2000-04-01	221.744
2000-07-01	222.288
2000-10-01	222.806
2001-01-01	224.385
2001-04-01	227.043
2001-07-01	230.244
2001-10-01	233.525
2002-01-01	237.212
2002-04-01	243.284
2002-07-01	246.267
2002-10-01	248.189
2003-01-01	249.153
2003-04-01	249.558
2003-07-01	250.681
2003-10-01	249.720
2004-01-01	244.784
2004-04-01	250.581
2004-07-01	259.033
2004-10-01	262.578
2005-01-01	255.789
2005-04-01	259.927
2005-07-01	259.236
2005-10-01	257.817
2006-01-01	255.294
2006-04-01	252.958
2006-07-01	250.747
2006-10-01	247.899
2007-01-01	245.647
2007-04-01	250.819
2007-07-01	260.437
2007-10-01	262.526
2008-01-01	275.642
2008-04-01	291.238
2008-07-01	299.098
2008-10-01	300.956
2009-01-01	296.081
2009-04-01	297.706
2009-07-01	296.140
2009-10-01	290.101
2010-01-01	293.555
2010-04-01	291.942
2010-07-01	292.141
2010-10-01	288.597
2011-01-01	294.997
2011-04-01	301.076
2011-07-01	312.953
2011-10-01	297.334
2012-01-01	320.394
2012-04-01	317.031
2012-07-01	305.858
2012-10-01	305.426
2013-01-01	315.968
2013-04-01	332.879
2013-07-01	339.604
2013-10-01	342.084
2014-01-01	364.459
2014-04-01	378.154
2014-07-01	387.555
2014-10-01	375.779
2015-01-01	389.709
2015-04-01	408.843
2015-07-01	418.190
2015-10-01	441.399
2016-01-01	461.841
2016-04-01	487.935
2016-07-01	495.816
2016-10-01	501.572
2017-01-01	514.266
2017-04-01	520.773
2017-07-01	524.718
2017-10-01	529.717
2018-01-01	535.713