Quarter	Billions of US Dollars
1973-07-01	0.0266
1973-10-01	0.0063
1975-01-01	0.0244
1977-04-01	0.0428
1977-07-01	0.0214
1981-01-01	0.0200
1981-07-01	0.0600
1981-10-01	0.0300
1982-07-01	0.0732
1982-10-01	0.1305
1983-01-01	0.0500
1983-04-01	0.3000
1983-07-01	0.1172
1983-10-01	0.3500
1984-01-01	0.4855
1984-04-01	0.6000
1984-07-01	0.2500
1984-10-01	0.4250
1985-01-01	0.4013
1985-04-01	0.7094
1985-07-01	0.6713
1985-10-01	0.6995
1986-01-01	0.2707
1986-04-01	0.7000
1986-07-01	0.3129
1986-10-01	0.6210
1987-01-01	0.3073
1987-04-01	0.0640
1988-01-01	0.1556
1988-04-01	0.2311
1988-10-01	0.0295
1989-01-01	0.7416
1989-04-01	0.0530
1989-07-01	0.0714
1989-10-01	0.0500
1990-01-01	0.3300
1990-04-01	0.2037
1990-07-01	0.9729
1991-01-01	0.8550
1991-04-01	0.5411
1991-10-01	0.1000
1992-01-01	0.0900
1992-04-01	0.1296
1992-10-01	0.2600
1993-01-01	0.1953
1993-04-01	0.0750
1993-07-01	0.4028
1993-10-01	2.2123
1994-01-01	1.0967
1994-04-01	1.0229
1994-07-01	1.5887
1994-10-01	2.2302
1995-01-01	0.4780
1995-04-01	0.5056
1995-07-01	0.7359
1995-10-01	2.8561
1996-01-01	2.3460
1996-04-01	1.4716
1996-07-01	1.7157
1996-10-01	1.7359
1997-01-01	1.5962
1997-04-01	2.0733
1997-07-01	1.3523
1997-10-01	0.5494
1998-01-01	0.3297
1998-04-01	0.5966
1998-07-01	0.3702
1998-10-01	0.9938
1999-01-01	1.7340
1999-04-01	1.9080
1999-07-01	1.3937
1999-10-01	1.7312
2000-01-01	1.7161
2000-04-01	0.6758
2000-07-01	0.8467
2000-10-01	2.8045
2001-01-01	1.1016
2001-04-01	3.3487
2001-07-01	1.1233
2001-10-01	1.7499
2002-01-01	4.6816
2002-04-01	4.2418
2002-07-01	2.1747
2002-10-01	2.1196
2003-01-01	2.6862
2003-04-01	4.0467
2003-07-01	2.6793
2003-10-01	1.9851
2004-01-01	2.5197
2004-04-01	6.3412
2004-07-01	7.4019
2004-10-01	8.6491
2005-01-01	8.7001
2005-04-01	2.6988
2005-07-01	1.3427
2005-10-01	3.1339
2006-01-01	1.5676
2006-04-01	2.8149
2006-07-01	0.5976
2006-10-01	2.4970
2007-01-01	1.9502
2007-04-01	5.0598
2007-07-01	1.1223
2007-10-01	1.6130
2008-01-01	0.9348
2008-04-01	1.4300
2008-07-01	2.6452
2008-10-01	2.4343
2009-01-01	1.0073
2009-04-01	3.2000
2009-07-01	2.8228
2009-10-01	2.2116
2010-01-01	4.2547
2010-04-01	3.5258
2010-07-01	4.3607
2010-10-01	6.6427
2011-01-01	4.4477
2011-04-01	12.9800
2011-07-01	5.8062
2011-10-01	6.7950
2012-01-01	11.2258
2012-04-01	6.9266
2012-07-01	7.2630
2012-10-01	6.7043
2013-01-01	8.5686
2013-04-01	12.0749
2013-07-01	5.7524
2013-10-01	6.5806
2014-01-01	9.7086
2014-04-01	14.5237
2014-07-01	15.4658
2014-10-01	7.1603
2015-01-01	10.1781
2015-04-01	12.9232