Quarter	Billions of US Dollars
1996-01-01	0.00240
1996-04-01	0.00471
1996-07-01	0.00227
1996-10-01	-0.00206
1997-01-01	-0.00682
1997-04-01	0.00811
1997-07-01	0.00000
1997-10-01	-0.00663
1998-01-01	-0.00116
1998-04-01	0.00001
1998-07-01	0.00005
1998-10-01	-0.00032
1999-07-01	-0.00055
2001-01-01	0.28066
2006-01-01	-0.36058
2011-07-01	0.56500
2012-10-01	0.60000