Quarter	Billions of US Dollars
1971-10-01	0.0306
1972-01-01	0.0815
1972-04-01	0.0400
1972-07-01	0.0513
1972-10-01	0.1448
1973-01-01	0.0953
1973-04-01	0.0250
1973-07-01	0.0757
1973-10-01	0.1092
1974-01-01	0.0050
1974-07-01	0.0019
1974-10-01	0.0750
1975-01-01	0.1675
1975-04-01	0.1466
1975-07-01	0.0490
1975-10-01	0.0618
1976-01-01	0.0617
1976-04-01	0.1931
1976-07-01	0.1307
1976-10-01	0.2724
1977-01-01	0.3189
1977-04-01	0.6124
1977-07-01	0.8820
1977-10-01	0.9382
1978-01-01	1.1764
1978-04-01	0.6848
1978-07-01	0.3959
1978-10-01	0.6101
1979-01-01	0.5744
1979-04-01	0.2639
1979-07-01	0.4834
1979-10-01	0.3221
1980-01-01	0.1112
1980-04-01	0.5610
1980-07-01	0.3128
1980-10-01	0.2769
1981-01-01	0.3197
1981-04-01	0.9451
1981-07-01	0.4792
1981-10-01	0.7702
1982-01-01	0.7845
1982-04-01	0.3101
1982-07-01	0.2444
1982-10-01	0.0181
1983-04-01	0.0500
1984-04-01	0.0913
1984-10-01	0.0432
1985-01-01	0.0288
1985-04-01	0.0100
1985-07-01	0.0212
1985-10-01	0.0972
1986-04-01	0.0500
1986-07-01	0.0388
1987-01-01	0.0489
1987-04-01	0.0500
1987-10-01	0.0562
1988-01-01	0.1778
1988-07-01	0.1000
1988-10-01	0.5575
1989-01-01	0.2627
1989-04-01	0.1000
1989-07-01	1.0000
1989-10-01	0.1500
1990-01-01	35.9186
1990-04-01	1.1884
1990-07-01	0.6232
1990-10-01	16.3755
1991-01-01	2.5644
1991-04-01	1.2400
1991-07-01	2.0829
1991-10-01	2.1762
1992-01-01	1.8121
1992-04-01	19.5500
1992-07-01	1.9794
1992-10-01	2.7384
1993-01-01	2.8181
1993-04-01	5.0191
1993-07-01	4.4272
1993-10-01	15.8577
1994-01-01	6.8512
1994-04-01	44.4628
1994-07-01	2.8929
1994-10-01	5.2676
1995-01-01	6.4076
1995-04-01	6.0270
1995-07-01	6.1845
1995-10-01	6.7729
1996-01-01	10.7362
1996-04-01	18.0204
1996-07-01	21.4137
1996-10-01	12.7776
1997-01-01	18.9758
1997-04-01	19.1798
1997-07-01	20.4861
1997-10-01	5.2001
1998-01-01	13.7651
1998-04-01	13.0736
1998-07-01	7.9780
1998-10-01	4.7972
1999-01-01	7.6379
1999-04-01	12.8196
1999-07-01	5.6532
1999-10-01	11.2223
2000-01-01	16.8814
2000-04-01	9.2212
2000-07-01	19.9511
2000-10-01	2.0748
2001-01-01	17.3311
2001-04-01	40.3473
2001-07-01	6.9609
2001-10-01	7.1989
2002-01-01	7.6229
2002-04-01	4.5395
2002-07-01	2.8923
2002-10-01	3.6924
2003-01-01	6.6904
2003-04-01	11.1892
2003-07-01	7.9874
2003-10-01	9.9956
2004-01-01	10.5477
2004-04-01	5.9527
2004-07-01	7.9777
2004-10-01	7.7189
2005-01-01	27.9394
2005-04-01	8.7055
2005-07-01	13.5022
2005-10-01	9.8853
2006-01-01	10.5906
2006-04-01	2.9030
2006-07-01	8.5995
2006-10-01	10.5296
2007-01-01	18.2267
2007-04-01	12.7859
2007-07-01	6.5978
2007-10-01	5.5650
2008-01-01	4.8755
2008-04-01	8.0772
2008-07-01	1.8275
2008-10-01	2.0816
2009-01-01	8.4579
2009-04-01	9.3586
2009-07-01	16.7375
2009-10-01	28.1324
2010-01-01	22.2570
2010-04-01	19.1112
2010-07-01	29.0384
2010-10-01	20.1936
2011-01-01	25.7268
2011-04-01	19.6659
2011-07-01	19.2634
2011-10-01	22.9973
2012-01-01	23.8049
2012-04-01	12.2350
2012-07-01	22.6648
2012-10-01	19.7338
2013-01-01	18.4235
2013-04-01	20.1170
2013-07-01	34.4431
2013-10-01	24.9695
2014-01-01	25.9407
2014-04-01	32.5030
2014-07-01	30.8751
2014-10-01	21.5911
2015-01-01	29.5446
2015-04-01	24.5296