Quarter	Billions of US Dollars
1989-04-01	0.09970
1989-10-01	0.04200
1994-07-01	5.11781
1997-04-01	0.03170
1999-04-01	0.05393
2001-10-01	0.22335
2002-01-01	1.24782
2005-07-01	0.15877
2006-01-01	0.02540
2006-10-01	0.22276
2008-07-01	0.38631
2009-04-01	0.06470
2012-07-01	1.35314
2013-10-01	1.22640
2014-04-01	2.03309
2015-01-01	3.49066