Quarter	Billions of US Dollars
1993-10-01	0.01050
1996-04-01	0.11500
1996-07-01	0.05000
1997-01-01	0.03115
1998-01-01	0.01000
2012-04-01	0.01586
2012-07-01	0.08361
2013-01-01	0.19291
2013-04-01	0.21714
2013-07-01	0.39025
2013-10-01	0.34849
2014-01-01	0.89783
2014-04-01	0.53645
2014-07-01	0.33142
2014-10-01	0.26557
2015-01-01	1.18739
2015-04-01	0.61847