Quarter	Billions of US Dollars
1973-04-01	0.00880
1976-07-01	0.01020
1980-07-01	0.00267
1985-10-01	-0.00134
1987-04-01	-0.00434
1989-01-01	-0.00864
1990-04-01	-0.00709
1998-01-01	1.27731
1998-07-01	-0.00532
1999-01-01	-0.00532
1999-07-01	-0.00532
2000-01-01	-0.00532
2000-07-01	-0.00532
2001-01-01	-0.00532
2001-07-01	-0.00532
2002-01-01	-0.00532
2002-07-01	-0.00532
2003-01-01	-0.00532
2003-07-01	-0.00639
2004-01-01	-0.00639
2004-07-01	-0.00639
2005-01-01	-0.00639
2005-07-01	-0.00639
2006-01-01	-0.00639
2006-07-01	-0.00639
2007-01-01	-0.00639
2007-07-01	-0.00639
2008-01-01	-0.00851
2008-07-01	-0.00851
2009-01-01	-0.00851
2009-07-01	-0.00851
2010-01-01	-0.00851
2010-04-01	1.48108
2010-07-01	-0.01277
2011-01-01	-0.01277
2011-07-01	-0.01277
2012-01-01	-0.01277
2012-07-01	-0.01703
2013-01-01	-0.01703
2013-07-01	-0.01703
2014-01-01	-0.01703
2014-07-01	0.73297
2015-01-01	0.98297