Quarter	Billions of US Dollars
1996-04-01	0.00709
1996-07-01	0.01399
1996-10-01	0.00714
1997-01-01	0.01529
1998-01-01	0.00280
1998-04-01	0.00170
1999-01-01	0.00289
1999-04-01	0.00294
1999-10-01	0.01411
2000-01-01	0.09668
2000-04-01	0.15440
2000-07-01	0.27870
2000-10-01	0.30551
2001-01-01	0.27134
2001-04-01	0.18664
2001-07-01	0.07095
2001-10-01	0.06177
2002-01-01	0.24293
2002-04-01	0.16006
2002-07-01	0.23046
2002-10-01	0.20105
2003-01-01	0.25115
2003-04-01	0.51283
2003-07-01	0.54225
2003-10-01	0.55524
2004-01-01	0.66974
2004-04-01	0.52879
2004-07-01	0.41378
2004-10-01	0.57586
2005-01-01	0.63170
2005-04-01	0.67448
2005-07-01	0.98058
2005-10-01	1.35576
2006-01-01	1.65762
2006-04-01	2.01040
2006-07-01	2.07242
2006-10-01	2.07946
2007-01-01	3.28439
2007-04-01	3.99056
2007-07-01	3.49809
2007-10-01	3.25568
2008-01-01	2.82510
2008-04-01	2.62880
2008-07-01	2.23049
2008-10-01	1.15614
2009-01-01	1.70253
2009-04-01	1.82982
2009-07-01	1.75921
2009-10-01	1.78312
2010-01-01	1.45179
2010-04-01	1.57586
2010-07-01	2.08029
2010-10-01	2.00706
2011-01-01	2.30190
2011-04-01	2.56435
2011-07-01	1.90886
2011-10-01	1.94157
2012-01-01	2.04556
2012-04-01	1.93858
2012-07-01	1.77518
2012-10-01	1.63814
2013-01-01	2.12101
2013-04-01	1.80370
2013-07-01	1.99595
2013-10-01	2.02145
2014-01-01	1.74667
2014-04-01	1.59313
2014-07-01	1.22963
2014-10-01	1.10113
2015-01-01	1.22007
2015-04-01	1.48215