Quarter	Billions of US Dollars
1993-07-01	0.060
1996-07-01	-0.012
1997-01-01	-0.012
1997-10-01	-0.012
1998-01-01	-0.012
1998-07-01	-0.012
2004-10-01	0.100
2012-01-01	0.200
2013-04-01	0.100
2014-10-01	-0.100