Quarter	Billions of US Dollars
1987-04-01	-0.02782
1987-07-01	-0.00185
1988-04-01	-0.00293
1989-01-01	-0.02724
1989-07-01	-0.02531
1996-04-01	0.15000
1996-10-01	0.05000
1999-04-01	-0.15000
1999-10-01	-0.05000
2000-07-01	0.11886
2005-04-01	0.62947
2005-07-01	-0.15241
2005-10-01	0.59420
2006-01-01	0.60097
2007-01-01	-1.96553
2011-07-01	0.29888
2012-07-01	1.51180
2014-07-01	0.15466