Quarter	Billions of US Dollars
1966-04-01	0.0100
1967-04-01	0.0250
1971-01-01	0.0256
1971-10-01	0.0124
1972-01-01	0.0576
1972-04-01	0.0443
1972-07-01	0.1007
1972-10-01	0.1282
1973-01-01	0.0427
1973-04-01	0.0432
1973-07-01	0.0428
1973-10-01	0.0425
1974-01-01	0.0162
1974-04-01	0.0028
1974-10-01	0.0515
1975-01-01	0.0216
1975-04-01	0.0777
1975-07-01	0.0841
1975-10-01	0.1264
1976-01-01	0.1578
1976-04-01	0.0854
1976-07-01	0.2991
1976-10-01	0.2448
1977-01-01	0.2880
1977-04-01	0.1745
1977-07-01	0.1288
1977-10-01	0.2344
1978-01-01	0.2591
1978-04-01	0.2189
1978-07-01	0.3244
1978-10-01	0.1586
1979-01-01	0.1808
1979-04-01	0.1533
1979-07-01	0.2115
1979-10-01	0.0874
1980-01-01	0.2007
1980-04-01	0.3773
1980-07-01	0.3599
1980-10-01	0.1640
1981-01-01	0.2269
1981-04-01	0.2435
1981-07-01	0.3269
1981-10-01	0.2343
1982-01-01	0.3257
1982-04-01	0.3113
1982-07-01	0.0746
1982-10-01	0.3769
1983-01-01	0.2856
1983-04-01	0.4816
1983-07-01	0.6877
1983-10-01	0.4662
1984-01-01	1.2825
1984-04-01	0.3150
1984-07-01	1.3940
1984-10-01	0.8357
1985-01-01	0.8213
1985-04-01	0.8333
1985-07-01	0.5197
1985-10-01	0.8173
1986-01-01	1.0004
1986-04-01	1.2413
1986-07-01	3.1337
1986-10-01	3.7589
1987-01-01	2.6929
1987-04-01	0.3903
1987-07-01	0.3360
1987-10-01	0.6531
1988-01-01	1.0529
1988-04-01	0.9548
1988-07-01	1.1679
1988-10-01	1.0123
1989-01-01	0.6391
1989-04-01	1.5024
1989-07-01	1.0217
1989-10-01	1.6941
1990-01-01	1.9002
1990-04-01	1.0524
1990-07-01	0.9633
1990-10-01	0.3612
1991-01-01	0.2569
1991-04-01	0.4614
1991-07-01	0.4961
1991-10-01	0.0569
1992-01-01	0.8406
1992-04-01	0.9467
1992-07-01	0.7028
1992-10-01	0.4199
1993-01-01	2.9402
1993-04-01	1.7836
1993-07-01	5.8476
1993-10-01	2.3877
1994-01-01	0.6605
1994-04-01	1.0062
1994-07-01	0.9046
1994-10-01	0.5047
1995-01-01	0.5175
1995-04-01	1.3041
1995-07-01	1.1469
1995-10-01	0.9956
1996-01-01	1.2686
1996-04-01	2.5632
1996-07-01	3.4249
1996-10-01	1.1611
1997-01-01	2.0698
1997-04-01	2.5683
1997-07-01	2.2563
1997-10-01	0.6690
1998-01-01	0.7385
1998-04-01	1.6133
1998-07-01	2.6407
1998-10-01	1.2266
1999-01-01	1.1477
1999-04-01	1.2599
1999-07-01	2.3472
1999-10-01	1.6755
2000-01-01	1.8149
2000-04-01	1.6377
2000-07-01	1.3281
2000-10-01	1.5498
2001-01-01	1.7958
2001-04-01	3.1993
2001-07-01	1.6951
2001-10-01	1.1256
2002-01-01	1.0308
2002-04-01	1.1984
2002-07-01	0.8880
2002-10-01	1.5037
2003-01-01	3.4219
2003-04-01	5.7570
2003-07-01	2.6224
2003-10-01	1.1025
2004-01-01	2.2695
2004-04-01	4.1624
2004-07-01	2.3764
2004-10-01	3.8173
2005-01-01	10.8429
2005-04-01	7.8695
2005-07-01	3.4415
2005-10-01	4.7827
2006-01-01	4.4572
2006-04-01	9.4965
2006-07-01	4.1666
2006-10-01	6.7675
2007-01-01	10.1835
2007-04-01	8.7292
2007-07-01	1.3889
2007-10-01	3.8510
2008-01-01	3.5870
2008-04-01	10.3731
2008-07-01	7.7816
2008-10-01	4.5713
2009-01-01	18.4137
2009-04-01	18.7825
2009-07-01	7.6850
2009-10-01	10.8558
2010-01-01	6.9331
2010-04-01	9.7478
2010-07-01	7.2529
2010-10-01	6.6127
2011-01-01	15.6771
2011-04-01	7.6310
2011-07-01	9.4204
2011-10-01	0.4401
2012-01-01	8.9497
2012-04-01	9.0151
2012-07-01	10.8832
2012-10-01	7.8056
2013-01-01	7.5625
2013-04-01	7.4121
2013-07-01	5.5933
2013-10-01	3.9018
2014-01-01	7.8987
2014-04-01	11.5741
2014-07-01	6.3402
2014-10-01	6.5881
2015-01-01	10.1590
2015-04-01	5.6141