Quarter	Billions of US Dollars
1993-07-01	0.29991
1993-10-01	0.32939
1994-01-01	0.30080
1994-04-01	0.34311
1994-07-01	0.37024
1994-10-01	0.75245
1995-01-01	0.73950
1995-04-01	0.54886
1995-07-01	0.44164
1995-10-01	0.93960
1996-01-01	1.32009
1996-04-01	1.33141
1996-07-01	1.12140
1996-10-01	0.70336
1997-01-01	0.80712
1997-04-01	1.12424
1997-07-01	0.69442
1997-10-01	0.66500
1998-01-01	0.40405
1998-04-01	0.15008
1998-07-01	0.33765
1998-10-01	1.71361
1999-01-01	1.71228
1999-04-01	1.66093
1999-07-01	2.27496
1999-10-01	0.96022
2000-01-01	2.10739
2000-04-01	2.12446
2000-07-01	0.94424
2000-10-01	2.10018
2001-01-01	3.20265
2001-04-01	3.23934
2001-07-01	3.66871
2001-10-01	4.57242
2002-01-01	3.03098
2002-04-01	3.57293
2002-07-01	4.65221
2002-10-01	2.47548
2003-01-01	2.86535
2003-04-01	2.79957
2003-07-01	1.69584
2003-10-01	1.72589
2004-01-01	1.24777
2004-04-01	1.34398
2004-07-01	1.52363
2004-10-01	1.62063
2005-01-01	2.45527
2005-04-01	1.87467
2005-07-01	1.40808
2005-10-01	3.58754
2006-01-01	3.79558
2006-04-01	4.27505
2006-07-01	5.39456
2006-10-01	4.63103
2007-01-01	5.35429
2007-04-01	5.57088
2007-07-01	4.44501
2007-10-01	3.76656
2008-01-01	2.76473
2008-04-01	1.87375
2008-07-01	1.89896
2008-10-01	2.47546
2009-01-01	2.43592
2009-04-01	2.86965
2009-07-01	2.82499
2009-10-01	2.97493
2010-01-01	2.82174
2010-04-01	3.11615
2010-07-01	4.97627
2010-10-01	4.47254
2011-01-01	5.01317
2011-04-01	6.16856
2011-07-01	4.37841
2011-10-01	5.51016
2012-01-01	6.01957
2012-04-01	5.75313
2012-07-01	5.30732
2012-10-01	4.11118
2013-01-01	3.29043
2013-04-01	6.63483
2013-07-01	8.79375
2013-10-01	8.86081
2014-01-01	9.64385
2014-04-01	5.57427
2014-07-01	4.77667
2014-10-01	6.04161
2015-01-01	7.05048
2015-04-01	9.22859