Quarter	Billions of US Dollars
1998-10-01	320.544
1999-01-01	294.791
1999-04-01	280.682
1999-07-01	274.968
1999-10-01	257.156
2000-01-01	250.947
2000-04-01	244.765
2000-07-01	220.185
2000-10-01	229.542
2001-01-01	217.936
2001-04-01	217.769
2001-07-01	229.555
2001-10-01	218.716
2002-01-01	216.886
2002-04-01	255.628
2002-07-01	252.963
2002-10-01	272.201
2003-01-01	289.496
2003-04-01	307.000
2003-07-01	312.970
2003-10-01	338.215
2004-01-01	336.466
2004-04-01	337.355
2004-07-01	347.592
2004-10-01	381.565
2005-01-01	362.287
2005-04-01	363.775
2005-07-01	349.286
2005-10-01	339.772
2006-01-01	341.397
2006-04-01	356.915
2006-07-01	352.155
2006-10-01	354.275
2007-01-01	361.208
2007-04-01	369.190
2007-07-01	383.736
2007-10-01	392.759
2008-01-01	438.420
2008-04-01	445.385
2008-07-01	415.435
2008-10-01	508.810
2009-01-01	506.463
2009-04-01	526.045
2009-07-01	543.560
2009-10-01	530.171
2010-01-01	504.657
2010-04-01	487.473
2010-07-01	543.338
2010-10-01	531.848
2011-01-01	557.264
2011-04-01	585.232
2011-07-01	572.953
2011-10-01	561.576
2012-01-01	580.992
2012-04-01	568.173
2012-07-01	594.263
2012-10-01	625.259
2013-01-01	604.152
2013-04-01	626.340
2013-07-01	636.613
2013-10-01	651.676
2014-01-01	655.836
2014-04-01	675.285
2014-07-01	626.181
2014-10-01	619.065
2015-01-01	570.203
2015-04-01	560.759
2015-07-01	559.084
2015-10-01	540.538
2016-01-01	581.830
2016-04-01	574.058
2016-07-01	563.463
2016-10-01	528.750
2017-01-01	515.571
2017-04-01	548.297
2017-07-01	553.279
2017-10-01	567.357
2018-01-01	566.602