Quarter	Billions of US Dollars
1969-01-01	0.0271
1969-04-01	0.0150
1969-10-01	0.0500
1970-07-01	0.0750
1971-01-01	0.0750
1971-04-01	0.0023
1971-07-01	0.0551
1971-10-01	0.0862
1972-01-01	0.1547
1972-04-01	0.5964
1972-07-01	0.2027
1972-10-01	0.4987
1973-01-01	0.1054
1973-04-01	0.3452
1973-07-01	0.2167
1973-10-01	0.5332
1974-01-01	0.4564
1974-04-01	0.5950
1974-07-01	0.5540
1974-10-01	0.5423
1975-01-01	0.6547
1975-04-01	0.9861
1975-07-01	1.0320
1975-10-01	2.2092
1976-01-01	3.2751
1976-04-01	1.6192
1976-07-01	1.7880
1976-10-01	2.1889
1977-01-01	1.1877
1977-04-01	1.3269
1977-07-01	1.5575
1977-10-01	1.0336
1978-01-01	1.4276
1978-04-01	1.7277
1978-07-01	0.7518
1978-10-01	0.9562
1979-01-01	1.7899
1979-04-01	0.7150
1979-07-01	0.7605
1979-10-01	0.4352
1980-01-01	0.6415
1980-04-01	1.4298
1980-07-01	0.4648
1980-10-01	0.6055
1981-01-01	0.9665
1981-04-01	2.8685
1981-07-01	2.6209
1981-10-01	3.8161
1982-01-01	3.6581
1982-04-01	2.6812
1982-07-01	3.3399
1982-10-01	1.3401
1983-01-01	1.8933
1983-04-01	1.9707
1983-07-01	1.2646
1983-10-01	1.6671
1984-01-01	2.0040
1984-04-01	1.7457
1984-07-01	1.6215
1984-10-01	1.0582
1985-01-01	2.6261
1985-04-01	2.8280
1985-07-01	1.6651
1985-10-01	2.7064
1986-01-01	4.6502
1986-04-01	5.4798
1986-07-01	3.5669
1986-10-01	3.8407
1987-01-01	2.9347
1987-04-01	3.1314
1987-07-01	1.7937
1987-10-01	1.9467
1988-01-01	3.1785
1988-04-01	3.4144
1988-07-01	3.6385
1988-10-01	2.5555
1989-01-01	5.5847
1989-04-01	2.6810
1989-07-01	2.0669
1989-10-01	2.9303
1990-01-01	3.9776
1990-04-01	2.2419
1990-07-01	2.4091
1990-10-01	4.6286
1991-01-01	7.8841
1991-04-01	6.1348
1991-07-01	6.9131
1991-10-01	5.3871
1992-01-01	6.0127
1992-04-01	10.0816
1992-07-01	6.8942
1992-10-01	2.7527
1993-01-01	14.8664
1993-04-01	7.3165
1993-07-01	6.5017
1993-10-01	4.2373
1994-01-01	9.8233
1994-04-01	9.3513
1994-07-01	5.2979
1994-10-01	2.0333
1995-01-01	3.2422
1995-04-01	3.7459
1995-07-01	7.8265
1995-10-01	2.5236
1996-01-01	8.0829
1996-04-01	10.5274
1996-07-01	10.2216
1996-10-01	7.3740
1997-01-01	6.1221
1997-04-01	6.3227
1997-07-01	9.0860
1997-10-01	3.8145
1998-01-01	9.8123
1998-04-01	11.8916
1998-07-01	5.3793
1998-10-01	8.3615
1999-01-01	8.7092
1999-04-01	8.9026
1999-07-01	8.3039
1999-10-01	5.9513
2000-01-01	6.0361
2000-04-01	3.5728
2000-07-01	6.1738
2000-10-01	1.7011
2001-01-01	10.6977
2001-04-01	14.4567
2001-07-01	7.4749
2001-10-01	11.5555
2002-01-01	11.6505
2002-04-01	15.9861
2002-07-01	13.6866
2002-10-01	8.8413
2003-01-01	15.8528
2003-04-01	19.6912
2003-07-01	11.2335
2003-10-01	16.3481
2004-01-01	7.7671
2004-04-01	11.3396
2004-07-01	12.9668
2004-10-01	13.6946
2005-01-01	11.5612
2005-04-01	10.0969
2005-07-01	8.1273
2005-10-01	13.5175
2006-01-01	13.8953
2006-04-01	11.7392
2006-07-01	12.6214
2006-10-01	23.6500
2007-01-01	21.8759
2007-04-01	24.5421
2007-07-01	17.7459
2007-10-01	23.2563
2008-01-01	27.4232
2008-04-01	62.2049
2008-07-01	25.6152
2008-10-01	13.2290
2009-01-01	24.8426
2009-04-01	38.0036
2009-07-01	25.4439
2009-10-01	29.4902
2010-01-01	27.5672
2010-04-01	38.4649
2010-07-01	46.6230
2010-10-01	26.5950
2011-01-01	36.6401
2011-04-01	38.9480
2011-07-01	31.9228
2011-10-01	36.4857
2012-01-01	43.9213
2012-04-01	19.6732
2012-07-01	28.0644
2012-10-01	30.3343
2013-01-01	26.1663
2013-04-01	28.9223
2013-07-01	61.7485
2013-10-01	36.3325
2014-01-01	38.2088
2014-04-01	37.9964
2014-07-01	46.4755
2014-10-01	28.7793
2015-01-01	57.1314
2015-04-01	29.6692