Quarter	Billions of US Dollars
1997-04-01	0.01196
1999-04-01	0.02700
1999-07-01	0.04100
1999-10-01	0.00300
2000-01-01	0.01080
2000-04-01	0.10000
2000-10-01	0.08000
2001-07-01	0.00850
2014-07-01	0.04996
2015-04-01	0.13192