Quarter	Billions of US Dollars
1993-07-01	0.83130
1993-10-01	0.81399
1994-01-01	1.07632
1994-04-01	1.15359
1994-07-01	1.23392
1994-10-01	1.24272
1995-01-01	1.41060
1995-04-01	1.50792
1995-07-01	1.44967
1995-10-01	1.34299
1996-01-01	1.60506
1996-04-01	1.55768
1996-07-01	1.47405
1996-10-01	1.69172
1997-01-01	1.51062
1997-04-01	2.18406
1997-07-01	2.04992
1997-10-01	1.99414
1998-01-01	1.98214
1998-04-01	2.03578
1998-07-01	2.06458
1998-10-01	2.08775
1999-01-01	2.05395
1999-04-01	2.08925
1999-07-01	1.95717
1999-10-01	1.99890
2000-01-01	1.77689
2000-04-01	2.15777
2000-07-01	1.76859
2000-10-01	1.99776
2001-01-01	1.91128
2001-04-01	2.11035
2001-07-01	2.19038
2001-10-01	2.12436
2002-01-01	1.67643
2002-04-01	1.76236
2002-07-01	2.98598
2002-10-01	2.69701
2003-01-01	2.66858
2003-04-01	2.88319
2003-07-01	2.52341
2003-10-01	2.72364
2004-01-01	2.18589
2004-04-01	3.05630
2004-07-01	3.10428
2004-10-01	3.39701
2005-01-01	3.37502
2005-04-01	4.07601
2005-07-01	3.20913
2005-10-01	3.07158
2006-01-01	2.99540
2006-04-01	3.51448
2006-07-01	3.67657
2006-10-01	2.95600
2007-01-01	2.96017
2007-04-01	1.33509
2007-07-01	1.38222
2007-10-01	1.18230
2008-01-01	1.10939
2008-04-01	0.83910
2008-07-01	0.85197
2008-10-01	0.90523
2009-01-01	0.68570
2009-04-01	0.70031
2009-07-01	0.74623
2009-10-01	0.59744
2010-01-01	0.58981
2010-04-01	0.62077
2010-07-01	0.65947
2010-10-01	0.67526
2011-01-01	0.66161
2011-04-01	0.37166
2011-07-01	0.39149
2011-10-01	0.38600
2012-01-01	0.36519
2012-04-01	0.37831
2012-07-01	0.38675
2012-10-01	0.34662
2013-01-01	0.31864
2013-04-01	0.10190
2013-07-01	0.10230
2013-10-01	0.09497
2014-01-01	0.09723
2014-04-01	0.09872
2014-07-01	0.09143
2014-10-01	0.08289
2015-01-01	0.08326
2015-04-01	0.05000