Quarter	Billions of US Dollars
1997-01-01	0.050069
1997-04-01	0.048650
1997-07-01	0.048085
1997-10-01	0.047596
1998-01-01	0.046220
1998-04-01	0.045459
1998-07-01	0.048617
2014-07-01	0.001247
2014-10-01	0.001190
2015-01-01	0.001064
2015-04-01	0.001105