Quarter	Billions of US Dollars
1998-04-01	0.10000
1998-07-01	0.10000
1998-10-01	0.10000
1999-01-01	0.10000
1999-07-01	0.15000
1999-10-01	0.15000
2000-01-01	0.30000
2000-04-01	0.36107
2000-07-01	0.20602
2000-10-01	0.20947
2001-01-01	0.05645
2002-01-01	0.15000
2002-10-01	0.02500
2003-01-01	0.12500
2003-04-01	0.12500
2003-07-01	0.10000
2003-10-01	0.18155
2004-01-01	0.25200
2004-04-01	0.15695
2004-07-01	0.48195
2004-10-01	0.73112
2005-01-01	0.91496
2005-04-01	1.43188
2005-07-01	1.50263
2005-10-01	1.36088
2006-01-01	1.61637
2006-04-01	1.66536
2006-07-01	1.81239
2006-10-01	2.37193
2007-01-01	1.90088
2007-04-01	1.88241
2007-07-01	1.54977
2007-10-01	1.10693
2008-01-01	2.01049
2008-04-01	1.66206
2008-07-01	2.25577
2008-10-01	3.61335
2009-01-01	2.82222
2009-04-01	2.36000
2009-07-01	2.69058
2009-10-01	0.89751
2010-01-01	1.17213
2010-04-01	2.06683
2010-07-01	3.06093
2010-10-01	2.88874
2011-01-01	2.98407
2011-04-01	4.66310
2011-07-01	3.36660
2011-10-01	3.51742
2012-01-01	5.01638
2012-04-01	3.64019
2012-07-01	6.33079
2012-10-01	6.19182
2013-01-01	5.55620
2013-04-01	4.65394
2013-07-01	2.89613
2013-10-01	2.34461
2014-01-01	1.37461
2014-04-01	0.83472
2014-07-01	0.48622
2014-10-01	2.26650
2015-01-01	2.53149
2015-04-01	3.25856