Quarter	Billions of US Dollars
1993-07-01	-0.11130
1996-04-01	0.03000
1997-04-01	0.13008
1999-01-01	-0.00647
2000-04-01	-0.05711
2001-01-01	0.24523
2001-04-01	-0.03000
2001-10-01	-0.01133
2002-04-01	-0.03220
2007-10-01	-0.39132
2011-10-01	0.24688
2012-01-01	0.70100
2013-10-01	0.00004
2014-04-01	0.68555
2014-07-01	0.37073