Quarter	Billions of US Dollars
1993-07-01	0.22750
1993-10-01	0.15906
1994-01-01	0.23631
1994-04-01	0.70555
1994-07-01	0.31196
1994-10-01	0.77887
1995-01-01	0.25461
1995-04-01	0.70820
1995-07-01	0.84514
1995-10-01	1.67076
1996-01-01	1.59476
1996-04-01	1.77595
1996-07-01	1.59649
1996-10-01	1.59636
1997-01-01	1.34845
1997-04-01	1.17462
1997-07-01	1.97935
1997-10-01	0.94648
1998-01-01	3.99035
1998-04-01	1.38560
1998-07-01	0.57785
1998-10-01	0.35372
1999-01-01	0.67011
1999-04-01	1.43284
1999-07-01	0.86421
1999-10-01	1.22945
2000-01-01	0.57189
2000-04-01	1.41332
2000-07-01	0.84038
2000-10-01	0.28473
2001-01-01	0.55004
2001-04-01	0.88122
2001-07-01	0.43541
2001-10-01	0.60739
2002-01-01	0.33372
2002-04-01	0.06390
2002-07-01	0.16344
2002-10-01	0.76380
2003-01-01	1.97613
2003-04-01	1.17503
2003-07-01	1.27308
2003-10-01	0.18293
2004-01-01	0.20899
2004-04-01	0.13068
2004-07-01	0.24585
2004-10-01	0.26709
2005-01-01	0.07800
2005-04-01	0.16069
2005-07-01	0.07926
2005-10-01	0.29748
2006-01-01	0.15678
2006-04-01	0.59799
2006-07-01	0.43145
2006-10-01	0.29695
2007-01-01	0.36680
2007-04-01	0.77301
2007-07-01	0.07439
2007-10-01	0.94700
2008-01-01	0.12203
2008-04-01	0.75877
2008-07-01	0.55684
2008-10-01	0.12945
2009-01-01	0.32630
2009-04-01	0.11234
2009-07-01	0.50633
2009-10-01	0.38574
2010-01-01	0.43337
2010-04-01	0.62521
2010-07-01	1.07077
2010-10-01	0.92944
2011-01-01	0.87588
2011-04-01	0.62165
2011-07-01	0.13872
2011-10-01	0.20094
2012-01-01	0.44580
2012-04-01	0.24426
2012-07-01	0.46918
2012-10-01	1.23643
2013-01-01	0.92332
2013-04-01	0.18195
2013-07-01	0.01456
2013-10-01	0.21637
2014-01-01	0.01586
2014-04-01	0.01013
2014-07-01	0.11673
2014-10-01	0.00589
2015-01-01	0.04564
2015-04-01	0.04115