Quarter	Billions of US Dollars
1981-10-01	0.02500
1994-01-01	0.04000
1994-04-01	0.04000
1997-01-01	4.87053
1997-04-01	0.15000
1998-01-01	0.00500
1998-10-01	0.15000
1999-07-01	0.00430
2002-01-01	1.43000
2002-10-01	0.50000
2003-01-01	0.75000
2003-10-01	0.50000
2004-04-01	0.50000
2004-10-01	0.80565
2005-01-01	0.40000
2005-07-01	0.97705
2005-10-01	0.50000
2006-01-01	0.10000
2006-07-01	0.21300
2006-10-01	0.97900
2007-01-01	2.12000
2007-07-01	1.66865
2007-10-01	0.01400
2009-01-01	1.35130
2009-04-01	0.02500
2009-07-01	1.07000
2009-10-01	0.70700
2010-01-01	0.67500
2010-04-01	1.65580
2010-07-01	1.53953
2010-10-01	3.00161
2011-01-01	1.12847
2011-07-01	0.30000
2011-10-01	0.32000
2012-01-01	2.72512
2012-04-01	1.34695
2012-07-01	1.57500
2012-10-01	0.50000
2013-01-01	2.84500
2013-04-01	2.36000
2013-10-01	0.69560
2014-01-01	1.40000
2014-04-01	1.30793
2014-07-01	1.40173
2014-10-01	5.01887
2015-01-01	1.55293
2015-04-01	1.15492