Quarter	Billions of US Dollars
1993-07-01	0.28600
1993-10-01	0.18250
1994-01-01	0.29929
1994-04-01	0.25750
1994-07-01	0.10057
1994-10-01	0.11550
1995-01-01	0.14483
1995-04-01	0.67713
1995-07-01	1.48886
1995-10-01	1.60876
1996-01-01	2.26338
1996-04-01	2.51669
1996-07-01	4.08618
1996-10-01	4.28100
1997-01-01	3.51120
1997-04-01	2.64186
1997-07-01	2.16927
1997-10-01	0.37519
1998-01-01	0.39005
1998-04-01	1.09237
1998-07-01	0.22441
1998-10-01	0.22233
1999-01-01	0.78583
1999-04-01	0.37560
1999-07-01	0.27641
1999-10-01	0.27100
2000-01-01	0.56980
2000-04-01	0.72123
2000-07-01	0.83408
2000-10-01	0.52412
2001-01-01	0.14421
2001-04-01	0.68723
2001-07-01	0.43521
2001-10-01	0.28961
2002-01-01	0.23300
2002-04-01	0.89693
2002-07-01	1.50183
2002-10-01	1.08220
2003-01-01	1.56170
2003-04-01	0.80170
2003-07-01	1.20381
2003-10-01	0.64315
2004-01-01	1.01998
2004-04-01	0.39317
2004-07-01	0.74597
2004-10-01	0.86858
2005-01-01	0.73951
2005-04-01	1.14561
2005-07-01	0.88325
2005-10-01	0.75684
2006-01-01	1.50901
2006-04-01	1.57520
2006-07-01	1.78876
2006-10-01	1.62583
2007-01-01	2.77230
2007-04-01	2.37310
2007-07-01	3.65741
2007-10-01	2.74517
2008-01-01	3.43993
2008-04-01	3.87247
2008-07-01	5.75061
2008-10-01	0.39595
2009-01-01	2.63497
2009-04-01	2.91959
2009-07-01	2.34872
2009-10-01	2.22811
2010-01-01	2.76202
2010-04-01	3.27479
2010-07-01	2.62311
2010-10-01	1.05393
2011-01-01	2.36467
2011-04-01	2.15672
2011-07-01	2.79225
2011-10-01	3.53327
2012-01-01	3.18795
2012-04-01	2.06429
2012-07-01	2.60989
2012-10-01	1.02912
2013-01-01	2.45024
2013-04-01	2.46060
2013-07-01	3.35511
2013-10-01	3.60777
2014-01-01	2.96968
2014-04-01	2.80142
2014-07-01	1.69621
2014-10-01	3.28085
2015-01-01	3.10647
2015-04-01	4.79827