Quarter	Billions of US Dollars
2003-07-01	0.03612
2003-10-01	0.03915
2004-01-01	0.03789
2004-04-01	0.15923
2005-07-01	0.27697
2005-10-01	0.27133
2006-01-01	0.27839
2006-04-01	0.29240
2008-10-01	0.20875
2009-01-01	0.19962
2009-04-01	0.21201
2009-07-01	0.21965
2013-04-01	0.52320
2013-07-01	0.54020
2013-10-01	0.55164
2014-01-01	0.55152
2014-10-01	0.04310
2015-01-01	0.03819
2015-04-01	0.07217