Quarter	Billions of US Dollars
1972-04-01	0.0315
1972-10-01	0.0200
1973-10-01	0.0300
1975-04-01	0.0120
1975-10-01	0.0192
1976-04-01	0.0250
1976-07-01	0.0600
1976-10-01	0.0709
1977-01-01	0.0619
1977-07-01	0.0304
1977-10-01	0.0622
1978-01-01	0.0250
1979-01-01	0.0250
1981-01-01	0.0750
1982-04-01	0.0500
1982-07-01	0.0750
1983-10-01	0.0700
1985-01-01	0.0039
1985-10-01	0.0750
1986-04-01	0.0360
1986-07-01	0.1300
1986-10-01	0.1000
1987-01-01	0.1519
1987-07-01	0.0750
1988-01-01	0.0797
1988-07-01	0.2748
1988-10-01	0.1280
1989-01-01	0.2153
1989-04-01	0.0207
1989-07-01	0.5111
1989-10-01	0.0867
1990-01-01	0.0750
1990-04-01	0.0400
1991-01-01	0.0351
1991-04-01	0.0200
1991-07-01	0.1100
1992-01-01	0.0890
1994-01-01	0.0282
1994-04-01	0.0497
1994-07-01	0.2000
1994-10-01	0.1000
1995-01-01	0.0500
1995-07-01	0.0400
1995-10-01	0.0297
1996-01-01	0.1650
1996-04-01	0.4872
1996-07-01	0.1388
1996-10-01	0.2419
1997-01-01	0.1700
1997-04-01	0.4374
1997-07-01	0.9200
1997-10-01	0.1557
1998-01-01	1.0390
1998-04-01	0.6345
1998-07-01	0.1322
1998-10-01	0.0142
1999-01-01	0.9811
1999-04-01	0.3513
1999-07-01	0.7857
1999-10-01	0.3672
2000-01-01	0.0934
2000-04-01	1.6423
2000-07-01	0.7245
2000-10-01	0.1097
2001-01-01	0.6630
2001-04-01	3.2750
2001-07-01	0.6960
2001-10-01	4.3649
2002-01-01	0.8479
2002-04-01	0.8363
2002-07-01	0.7074
2002-10-01	0.6283
2003-01-01	0.7502
2003-04-01	1.9338
2003-07-01	1.7242
2003-10-01	3.6896
2004-01-01	1.7053
2004-04-01	2.1973
2004-07-01	3.4949
2004-10-01	2.6179
2005-01-01	1.3332
2005-04-01	1.2371
2005-07-01	3.8210
2005-10-01	2.3157
2006-01-01	1.0094
2006-04-01	4.0961
2006-07-01	1.2998
2006-10-01	2.1158
2007-01-01	2.9778
2007-04-01	5.3244
2007-07-01	1.1859
2007-10-01	1.4647
2008-01-01	1.5425
2008-04-01	1.5725
2008-07-01	0.5788
2008-10-01	0.0585
2009-01-01	0.0202
2009-04-01	0.7174
2009-07-01	2.7117
2009-10-01	3.0469
2010-01-01	1.1859
2010-04-01	1.8509
2010-07-01	4.9379
2010-10-01	1.1912
2011-01-01	2.8372
2011-04-01	3.6428
2011-07-01	0.6302
2011-10-01	4.3961
2012-01-01	10.8551
2012-04-01	3.1869
2012-07-01	9.4407
2012-10-01	5.5532
2013-01-01	4.7978
2013-04-01	4.2409
2013-07-01	3.9908
2013-10-01	4.6920
2014-01-01	4.7192
2014-04-01	7.8259
2014-07-01	10.9165
2014-10-01	3.0866
2015-01-01	5.4185
2015-04-01	7.6586