Quarter	Billions of US Dollars
1987-01-01	0.08765
1987-04-01	0.05950
1987-07-01	0.05750
1987-10-01	0.06251
1988-01-01	0.06049
1988-04-01	0.05490
1988-07-01	0.05360
1988-10-01	0.05499
1989-01-01	0.02532
1989-04-01	0.02514
1996-04-01	0.15000
1996-07-01	0.15000
1996-10-01	0.20000
1997-01-01	0.20000
1997-04-01	0.20000
1997-07-01	0.20000
1997-10-01	0.20000
1998-01-01	0.20000
1998-04-01	0.20000
1998-07-01	0.20000
1998-10-01	0.20000
1999-01-01	0.20000
1999-04-01	0.05000
1999-07-01	0.05000
2000-07-01	0.10956
2000-10-01	0.11631
2001-01-01	0.11040
2001-04-01	0.10600
2001-07-01	0.11414
2001-10-01	0.11016
2002-01-01	0.10905
2002-04-01	0.12469
2002-07-01	0.12325
2002-10-01	0.13109
2003-01-01	0.13619
2003-04-01	0.14284
2003-07-01	0.14565
2003-10-01	0.15787
2004-01-01	0.15280
2004-04-01	0.15194
2004-07-01	0.15511
2004-10-01	0.17026
2005-01-01	0.16205
2005-04-01	0.75575
2005-07-01	0.60210
2005-10-01	1.17970
2006-01-01	1.81560
2006-04-01	1.90695
2006-07-01	1.89900
2006-10-01	1.97550
2011-07-01	0.27735
2011-10-01	0.26570
2012-01-01	0.27682
2012-04-01	0.26167
2012-07-01	1.80171
2012-10-01	1.81824
2013-01-01	1.78773
2013-04-01	1.79686
2013-07-01	1.82855
2013-10-01	1.84128
2014-01-01	1.84842
2014-04-01	1.84241
2014-07-01	1.92686
2014-10-01	1.89370
2015-01-01	1.89556
2015-04-01	1.93274