Quarter	Billions of US Dollars
1972-04-01	0.02520
1973-01-01	0.03000
1973-04-01	0.01720
1976-04-01	0.00340
1976-07-01	0.00680
1977-07-01	0.04300
1978-04-01	0.06770
1978-10-01	0.05200
1979-01-01	0.10280
1979-07-01	0.04960
1982-01-01	0.31450
1982-04-01	0.04000
1982-10-01	0.30000
1983-01-01	0.06240
1983-04-01	0.21190
1983-07-01	0.85000
1983-10-01	0.10740
1984-01-01	0.35000
1984-04-01	0.06620
1984-07-01	0.12220
1984-10-01	0.60000
1985-01-01	0.60000
1985-04-01	0.29250
1985-07-01	0.65000
1985-10-01	0.47070
1986-07-01	0.04350
1987-04-01	0.16610
1988-01-01	0.23300
1988-04-01	0.12970
1989-01-01	0.22900
1989-07-01	0.20000
1990-07-01	0.20000
1991-01-01	0.19020
1991-04-01	0.02800
1993-04-01	0.50000
1993-10-01	0.46300
1994-04-01	0.73500
1994-07-01	0.56000
1994-10-01	0.40000
1995-07-01	1.55000
1995-10-01	0.35000
1996-01-01	0.35438
1996-04-01	0.30430
1996-07-01	0.11500
1996-10-01	2.26000
1997-01-01	0.50940
1997-04-01	2.08079
1997-07-01	0.68500
1997-10-01	0.33301
1999-01-01	0.94230
1999-04-01	1.00000
1999-07-01	0.75000
1999-10-01	0.02100
2000-01-01	0.00300
2000-04-01	0.17119
2000-07-01	0.56000
2000-10-01	0.97069
2001-01-01	0.74298
2001-04-01	1.40000
2001-07-01	0.03750
2001-10-01	0.67316
2002-01-01	1.17500
2002-04-01	3.71455
2002-07-01	0.40000
2002-10-01	1.50000
2003-01-01	0.76411
2003-04-01	0.14577
2003-07-01	0.13269
2003-10-01	1.44157
2004-01-01	2.25689
2004-04-01	1.90538
2004-07-01	1.58831
2004-10-01	2.17389
2005-01-01	1.41500
2005-04-01	1.35793
2005-07-01	1.11036
2005-10-01	0.27929
2006-01-01	1.51118
2006-04-01	0.35263
2006-07-01	1.38719
2006-10-01	1.45260
2007-01-01	0.32664
2007-04-01	2.42184
2007-07-01	0.32121
2007-10-01	0.84275
2008-01-01	0.82993
2008-04-01	0.19164
2008-07-01	0.67584
2008-10-01	0.27156
2009-01-01	0.53541
2009-04-01	0.83334
2009-07-01	5.76867
2009-10-01	1.20439
2010-01-01	1.45636
2010-04-01	3.11405
2010-07-01	2.65974
2010-10-01	1.78771
2011-01-01	0.92348
2011-04-01	4.72767
2011-07-01	1.42137
2011-10-01	1.74738
2012-01-01	5.34240
2012-04-01	7.50306
2012-07-01	4.50491
2012-10-01	1.02886
2013-01-01	2.14074
2013-04-01	4.83299
2013-07-01	0.53630
2013-10-01	3.06424
2014-01-01	1.13895
2014-04-01	2.34162
2014-07-01	2.24304
2014-10-01	3.25933
2015-01-01	5.36153
2015-04-01	2.87380