Quarter	Billions of US Dollars
1998-10-01	370.240
1999-01-01	346.613
1999-04-01	325.524
1999-07-01	333.879
1999-10-01	303.549
2000-01-01	295.645
2000-04-01	291.774
2000-07-01	270.503
2000-10-01	282.281
2001-01-01	274.154
2001-04-01	264.220
2001-07-01	290.277
2001-10-01	271.867
2002-01-01	272.190
2002-04-01	312.327
2002-07-01	315.044
2002-10-01	332.960
2003-01-01	355.055
2003-04-01	375.518
2003-07-01	377.562
2003-10-01	391.678
2004-01-01	399.470
2004-04-01	392.977
2004-07-01	403.554
2004-10-01	430.964
2005-01-01	427.567
2005-04-01	406.715
2005-07-01	399.604
2005-10-01	381.860
2006-01-01	398.084
2006-04-01	409.038
2006-07-01	411.664
2006-10-01	414.287
2007-01-01	427.973
2007-04-01	429.020
2007-07-01	459.107
2007-10-01	456.412
2008-01-01	512.954
2008-04-01	500.954
2008-07-01	466.396
2008-10-01	481.491
2009-01-01	481.399
2009-04-01	518.760
2009-07-01	547.109
2009-10-01	529.905
2010-01-01	520.818
2010-04-01	483.678
2010-07-01	540.454
2010-10-01	507.513
2011-01-01	555.110
2011-04-01	567.497
2011-07-01	545.144
2011-10-01	522.783
2012-01-01	569.130
2012-04-01	551.137
2012-07-01	577.404
2012-10-01	595.051
2013-01-01	594.750
2013-04-01	605.015
2013-07-01	618.406
2013-10-01	620.068
2014-01-01	667.196
2014-04-01	678.383
2014-07-01	633.160
2014-10-01	614.176
2015-01-01	574.304
2015-04-01	571.208
2015-07-01	575.830
2015-10-01	550.378
2016-01-01	605.371
2016-04-01	606.267
2016-07-01	610.335
2016-10-01	554.850
2017-01-01	566.697
2017-04-01	595.406
2017-07-01	621.780
2017-10-01	619.898
2018-01-01	648.901