Quarter	Billions of US Dollars
1993-07-01	0.030000
1993-10-01	0.015000
1994-01-01	-0.015000
1994-07-01	-0.030000
1995-04-01	0.050000
1996-04-01	-0.050000
1996-10-01	0.030000
1997-01-01	0.024748
1997-04-01	0.070999
1997-07-01	0.029677
1997-10-01	-0.010038
1998-01-01	-0.097619
1998-04-01	0.019201
1998-07-01	-0.046431
1998-10-01	-0.008345
1999-01-01	-0.004290
2008-01-01	0.089444
2009-01-01	-0.067033