Quarter	Billions of US Dollars
1966-01-01	0.0200
1967-10-01	0.0150
1971-01-01	0.0450
1971-04-01	0.0229
1971-07-01	0.0150
1972-01-01	0.1197
1972-04-01	0.0300
1972-07-01	0.0250
1972-10-01	0.0811
1973-01-01	0.0582
1973-04-01	0.0388
1973-10-01	0.0458
1974-01-01	0.0220
1974-04-01	0.0500
1974-07-01	0.0100
1974-10-01	0.0728
1975-01-01	0.3919
1975-04-01	0.3078
1975-07-01	0.1087
1975-10-01	0.3046
1976-01-01	0.3118
1976-04-01	0.1625
1976-07-01	0.2690
1976-10-01	0.4393
1977-01-01	0.3397
1977-04-01	0.3741
1977-07-01	0.3207
1977-10-01	0.4384
1978-01-01	0.1336
1978-04-01	0.4397
1978-07-01	0.0359
1978-10-01	0.1124
1979-01-01	0.2808
1979-04-01	0.8014
1979-07-01	0.0693
1979-10-01	0.4363
1980-01-01	0.6122
1980-04-01	1.0250
1980-07-01	0.6964
1980-10-01	0.8217
1981-01-01	0.6415
1981-04-01	0.2772
1981-07-01	0.1639
1981-10-01	0.5698
1982-01-01	1.1992
1982-04-01	0.2921
1982-07-01	0.3782
1982-10-01	0.6298
1983-01-01	2.0974
1983-04-01	0.2808
1983-07-01	0.2417
1983-10-01	1.2122
1984-01-01	1.4218
1984-04-01	2.6001
1984-07-01	0.2467
1984-10-01	2.2751
1985-01-01	1.6822
1985-04-01	2.4408
1985-07-01	0.2493
1985-10-01	1.5054
1986-01-01	2.3924
1986-04-01	1.2119
1986-07-01	1.5331
1986-10-01	0.9023
1987-01-01	1.9472
1987-04-01	1.2610
1987-07-01	0.8314
1987-10-01	0.4217
1988-01-01	2.8513
1988-04-01	2.7244
1988-07-01	1.1287
1988-10-01	1.9119
1989-01-01	2.7981
1989-04-01	1.1889
1989-07-01	0.6589
1989-10-01	2.9601
1990-01-01	1.8714
1990-04-01	2.1698
1990-07-01	1.4226
1990-10-01	0.8716
1991-01-01	2.8038
1991-04-01	1.5108
1991-07-01	1.2299
1991-10-01	1.4047
1992-01-01	1.7032
1992-04-01	4.7644
1992-07-01	0.3801
1992-10-01	2.0844
1993-01-01	6.0610
1993-04-01	1.9756
1993-07-01	3.9968
1993-10-01	5.8113
1994-01-01	7.7817
1994-04-01	8.7473
1994-07-01	7.0585
1994-10-01	3.9774
1995-01-01	4.4695
1995-04-01	5.3749
1995-07-01	5.3922
1995-10-01	6.1772
1996-01-01	8.0270
1996-04-01	33.7604
1996-07-01	37.0109
1996-10-01	5.4881
1997-01-01	7.4175
1997-04-01	4.3072
1997-07-01	3.2726
1997-10-01	4.4563
1998-01-01	2.4485
1998-04-01	6.1449
1998-07-01	1.4744
1998-10-01	2.6853
1999-01-01	3.6903
1999-04-01	6.2352
1999-07-01	4.5166
1999-10-01	5.2345
2000-01-01	5.6237
2000-04-01	2.7043
2000-07-01	3.0034
2000-10-01	3.3483
2001-01-01	6.3267
2001-04-01	6.9284
2001-07-01	3.1253
2001-10-01	5.3163
2002-01-01	5.3093
2002-04-01	7.6776
2002-07-01	4.5857
2002-10-01	6.5938
2003-01-01	7.8673
2003-04-01	8.8987
2003-07-01	5.7346
2003-10-01	6.8482
2004-01-01	9.7054
2004-04-01	6.9756
2004-07-01	5.7309
2004-10-01	10.6802
2005-01-01	14.3538
2005-04-01	11.3129
2005-07-01	11.1853
2005-10-01	13.8587
2006-01-01	17.8932
2006-04-01	13.6991
2006-07-01	10.9750
2006-10-01	20.4124
2007-01-01	23.0666
2007-04-01	31.1319
2007-07-01	10.6425
2007-10-01	13.5909
2008-01-01	14.0442
2008-04-01	33.3516
2008-07-01	23.3307
2008-10-01	16.2333
2009-01-01	37.0374
2009-04-01	43.6940
2009-07-01	33.0750
2009-10-01	22.1727
2010-01-01	38.2559
2010-04-01	22.9267
2010-07-01	15.6001
2010-10-01	15.9920
2011-01-01	37.2955
2011-04-01	32.2390
2011-07-01	21.4146
2011-10-01	14.1001
2012-01-01	44.3810
2012-04-01	26.5183
2012-07-01	30.5954
2012-10-01	25.3856
2013-01-01	39.4936
2013-04-01	37.7540
2013-07-01	25.0249
2013-10-01	20.7698
2014-01-01	31.2131
2014-04-01	35.4513
2014-07-01	24.0511
2014-10-01	22.5930
2015-01-01	28.3976
2015-04-01	27.6614