Quarter	Billions of US Dollars
1993-07-01	0.32529
1993-10-01	0.38828
1994-01-01	0.20000
1994-04-01	0.29402
1994-07-01	0.29688
1994-10-01	0.19548
1995-01-01	0.22196
1995-04-01	0.11238
1995-07-01	0.21881
1995-10-01	0.10464
1996-01-01	0.22665
1996-04-01	0.22356
1996-07-01	0.28874
1996-10-01	0.28579
1997-01-01	0.26341
1997-04-01	0.34574
1997-07-01	0.43219
1997-10-01	0.41928
1998-01-01	0.37822
1998-04-01	0.63412
1998-07-01	0.76253
1998-10-01	1.02812
1999-01-01	1.24407
1999-04-01	0.87426
1999-07-01	0.58392
1999-10-01	0.35669
2000-01-01	0.15500
2000-04-01	0.33925
2000-07-01	0.32938
2000-10-01	0.33612
2001-01-01	0.36951
2001-04-01	0.15000
2001-07-01	0.19028
2001-10-01	0.25946
2002-01-01	0.10741
2002-04-01	0.11600
2002-07-01	0.07518
2002-10-01	0.24233
2003-01-01	0.33445
2003-04-01	0.46042
2003-07-01	0.50488
2003-10-01	0.39646
2004-01-01	0.30278
2004-04-01	0.20715
2004-07-01	0.28912
2004-10-01	0.42242
2005-01-01	0.15000
2005-04-01	0.15000
2006-01-01	0.41159
2006-04-01	1.05803
2006-07-01	2.40043
2006-10-01	2.63360
2007-01-01	2.58987
2007-04-01	1.95936
2007-07-01	0.60300
2007-10-01	0.53300
2008-01-01	0.60605
2008-04-01	1.39392
2008-07-01	1.56542
2008-10-01	1.86001
2009-01-01	2.65202
2009-04-01	2.36793
2009-07-01	2.79388
2009-10-01	3.29915
2010-01-01	4.26070
2010-04-01	5.98842
2010-07-01	5.76350
2010-10-01	5.47719
2011-01-01	5.21589
2011-04-01	4.97298
2011-07-01	6.75232
2011-10-01	7.34981
2012-01-01	6.09894
2012-04-01	4.50934
2012-07-01	2.32862
2012-10-01	1.14270
2013-01-01	1.03000
2013-04-01	1.78290
2013-07-01	2.21765
2013-10-01	4.88030
2014-01-01	6.62405
2014-04-01	5.51856
2014-07-01	5.19852
2014-10-01	2.75158
2015-01-01	1.69789
2015-04-01	2.58994