Quarter	Billions of US Dollars
1993-07-01	0.28300
1993-10-01	0.30000
1994-01-01	1.00000
1994-07-01	0.61220
1995-10-01	0.38470
1996-01-01	0.40000
1996-07-01	1.00000
1997-04-01	0.28772
1997-10-01	0.50000
1998-07-01	-0.21429
1998-10-01	1.00000
1999-07-01	-0.26406
2000-07-01	0.28767
2001-04-01	1.48186
2001-07-01	-0.70000
2002-04-01	-0.23478
2002-10-01	-0.64411
2003-01-01	-0.30000
2003-10-01	1.16538
2004-01-01	-1.00000
2004-07-01	-0.27295
2004-10-01	1.74812
2005-07-01	-0.26969
2006-04-01	-0.69074
2006-07-01	-0.30000
2008-10-01	-1.52836
2009-10-01	-0.50000
2010-10-01	1.20200
2011-04-01	-1.00000
2011-07-01	3.10440
2012-04-01	6.09524
2012-07-01	0.87094
2012-10-01	-0.47619
2013-07-01	0.80318
2013-10-01	0.30551
2014-04-01	1.70101
2014-07-01	-1.86686
2014-10-01	0.70549
2015-04-01	-2.43387