Quarter	Billions of US Dollars
1973-04-01	0.04300
1978-04-01	0.02500
1980-04-01	0.03000
1982-04-01	0.04000
1983-04-01	-0.02500
1983-10-01	0.04500
1984-10-01	-0.04300
1985-04-01	0.03000
1985-10-01	-0.01900
1986-10-01	-0.01600
1987-04-01	-0.03200
1988-01-01	-0.01800
1989-04-01	-0.06000
1999-10-01	0.10000
2001-07-01	1.50000
2004-10-01	-0.10000
2005-07-01	2.80362
2006-01-01	0.37800
2006-07-01	-0.50000
2006-10-01	0.40000
2007-01-01	0.75000
2007-07-01	1.05514
2008-04-01	0.06670
2009-04-01	0.13770
2010-01-01	0.12224
2010-04-01	0.88313
2010-07-01	0.61199
2010-10-01	0.04708
2011-01-01	0.04369
2011-04-01	-2.14136
2011-07-01	-0.98808
2011-10-01	-0.00099
2012-01-01	0.01490
2012-04-01	-0.12264
2012-07-01	-1.00206
2012-10-01	0.44287
2013-01-01	0.01011
2013-04-01	2.73633
2013-07-01	1.04089
2013-10-01	-0.38326
2014-01-01	-0.06210
2014-04-01	-0.01658
2014-07-01	-0.00351
2014-10-01	-2.72266
2015-01-01	-0.02589
2015-04-01	1.63286