Quarter	Billions of US Dollars
1993-07-01	50.915
1993-10-01	67.590
1994-01-01	71.162
1994-04-01	74.879
1994-07-01	72.146
1994-10-01	61.621
1995-01-01	52.859
1995-04-01	51.671
1995-07-01	70.348
1995-10-01	58.459
1996-01-01	95.662
1996-04-01	99.803
1996-07-01	107.673
1996-10-01	135.577
1997-01-01	132.838
1997-04-01	130.506
1997-07-01	133.483
1997-10-01	45.827
1998-01-01	144.391
1998-04-01	179.755
1998-07-01	95.865
1998-10-01	40.154
1999-01-01	178.278
1999-04-01	245.531
1999-07-01	201.028
1999-10-01	124.076
2000-01-01	182.983
2000-04-01	196.957
2000-07-01	235.147
2000-10-01	218.898
2001-01-01	357.601
2001-04-01	317.578
2001-07-01	196.909
2001-10-01	279.600
2002-01-01	241.755
2002-04-01	259.388
2002-07-01	102.153
2002-10-01	142.606
2003-01-01	224.132
2003-04-01	278.048
2003-07-01	268.413
2003-10-01	316.746
2004-01-01	339.995
2004-04-01	260.450
2004-07-01	267.174
2004-10-01	325.908
2005-01-01	342.357
2005-04-01	358.379
2005-07-01	180.195
2005-10-01	483.128
2006-01-01	449.226
2006-04-01	451.870
2006-07-01	456.846
2006-10-01	732.715
2007-01-01	641.031
2007-04-01	853.467
2007-07-01	280.701
2007-10-01	310.597
2008-01-01	179.356
2008-04-01	741.198
2008-07-01	213.589
2008-10-01	451.639
2009-01-01	367.006
2009-04-01	580.596
2009-07-01	298.663
2009-10-01	279.539
2010-01-01	303.496
2010-04-01	16.372
2010-07-01	240.316
2010-10-01	95.514
2011-01-01	213.529
2011-04-01	147.044
2011-07-01	6.215
2011-10-01	66.962
2012-01-01	356.605
2012-04-01	-39.242
2012-07-01	148.585
2012-10-01	245.962
2013-01-01	13.125
2013-04-01	105.573
2013-07-01	111.675
2013-10-01	265.695
2014-01-01	57.606
2014-04-01	249.657
2014-07-01	198.292
2014-10-01	76.992
2015-01-01	175.534
2015-04-01	243.979