Quarter	Billions of US Dollars
1993-07-01	1.05457
1993-10-01	0.72560
1994-01-01	0.60394
1994-04-01	0.52019
1994-07-01	0.71406
1994-10-01	0.60040
1995-01-01	0.65540
1995-04-01	0.89038
1995-07-01	0.79841
1995-10-01	0.85804
1996-01-01	0.96375
1996-04-01	0.58897
1996-07-01	0.34072
1996-10-01	0.47313
1997-01-01	0.61934
1997-04-01	0.61904
1997-07-01	0.40263
1997-10-01	0.78279
1998-01-01	0.69493
1998-04-01	0.73783
1998-07-01	0.91717
1998-10-01	0.91614
1999-01-01	1.10535
1999-04-01	1.07108
1999-07-01	0.82185
1999-10-01	0.82045
2000-01-01	0.42069
2000-04-01	0.30161
2000-07-01	0.59218
2000-10-01	0.78016
2001-01-01	0.78411
2001-04-01	0.70122
2001-07-01	0.83836
2001-10-01	0.75772
2002-01-01	1.06401
2002-04-01	0.94874
2002-07-01	0.51439
2002-10-01	1.77438
2003-01-01	1.56085
2003-04-01	1.61283
2003-07-01	1.68282
2003-10-01	0.74712
2004-01-01	1.47733
2004-04-01	1.73990
2004-07-01	1.83742
2004-10-01	1.34783
2005-01-01	1.78491
2005-04-01	1.76189
2005-07-01	1.81804
2005-10-01	3.06056
2006-01-01	1.95774
2006-04-01	3.13873
2006-07-01	3.16513
2006-10-01	2.19999
2007-01-01	2.95749
2007-04-01	2.18897
2007-07-01	2.32119
2007-10-01	2.11205
2008-01-01	1.58692
2008-04-01	1.56351
2008-07-01	1.36615
2008-10-01	2.36065
2009-01-01	2.19118
2009-04-01	2.57074
2009-07-01	2.84869
2009-10-01	2.76442
2010-01-01	2.59940
2010-04-01	2.08340
2010-07-01	2.59089
2010-10-01	1.45099
2011-01-01	1.53356
2011-04-01	1.96030
2011-07-01	1.48829
2011-10-01	1.07984
2012-01-01	1.22222
2012-04-01	1.11086
2012-07-01	1.17447
2012-10-01	1.95176
2013-01-01	4.68760
2013-04-01	6.08059
2013-07-01	6.31558
2013-10-01	6.46617
2014-01-01	3.52823
2014-04-01	1.72926
2014-07-01	4.84923
2014-10-01	3.98543
2015-01-01	3.35214
2015-04-01	4.82319