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	0.0223
1971-07-01	0.0551
1971-10-01	0.0862
1972-01-01	0.1547
1972-04-01	0.5464
1972-07-01	0.2427
1972-10-01	0.4987
1973-01-01	0.1054
1973-04-01	0.3202
1973-07-01	0.2167
1973-10-01	0.5746
1974-01-01	0.4564
1974-04-01	0.5900
1974-07-01	0.5163
1974-10-01	0.5023
1975-01-01	0.6547
1975-04-01	0.9839
1975-07-01	0.9197
1975-10-01	2.0251
1976-01-01	3.1757
1976-04-01	1.4669
1976-07-01	1.6756
1976-10-01	2.1389
1977-01-01	1.0389
1977-04-01	1.2810
1977-07-01	1.5575
1977-10-01	0.8836
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	0.7238
1979-07-01	1.0105
1979-10-01	0.4352
1980-01-01	0.6415
1980-04-01	1.3068
1980-07-01	0.6359
1980-10-01	0.6455
1981-01-01	0.9550
1981-04-01	2.7457
1981-07-01	2.3667
1981-10-01	3.8161
1982-01-01	3.6095
1982-04-01	2.7062
1982-07-01	2.8649
1982-10-01	1.5701
1983-01-01	1.9433
1983-04-01	1.9257
1983-07-01	1.2571
1983-10-01	1.5170
1984-01-01	1.9833
1984-04-01	1.7360
1984-07-01	1.4917
1984-10-01	1.1082
1985-01-01	2.2657
1985-04-01	2.2925
1985-07-01	1.4617
1985-10-01	2.9214
1986-01-01	3.9471
1986-04-01	5.8115
1986-07-01	3.2133
1986-10-01	3.4242
1987-01-01	2.5864
1987-04-01	2.9828
1987-07-01	1.1893
1987-10-01	1.9467
1988-01-01	2.9708
1988-04-01	3.2471
1988-07-01	3.3853
1988-10-01	2.6486
1989-01-01	4.9972
1989-04-01	2.6545
1989-07-01	2.1624
1989-10-01	2.6282
1990-01-01	4.3722
1990-04-01	2.0181
1990-07-01	2.1565
1990-10-01	4.3641
1991-01-01	7.7590
1991-04-01	6.0685
1991-07-01	6.4580
1991-10-01	5.3273
1992-01-01	5.6690
1992-04-01	8.7387
1992-07-01	6.0604
1992-10-01	2.4356
1993-01-01	14.3619
1993-04-01	6.7916
1993-07-01	6.1634
1993-10-01	4.3959
1994-01-01	9.7328
1994-04-01	9.0131
1994-07-01	5.1753
1994-10-01	1.7954
1995-01-01	3.0857
1995-04-01	3.0126
1995-07-01	6.8920
1995-10-01	2.1443
1996-01-01	7.5294
1996-04-01	9.6122
1996-07-01	8.9611
1996-10-01	7.2494
1997-01-01	5.9087
1997-04-01	5.7705
1997-07-01	8.6863
1997-10-01	4.0792
1998-01-01	9.5817
1998-04-01	12.8947
1998-07-01	5.0803
1998-10-01	9.3908
1999-01-01	10.4946
1999-04-01	9.3122
1999-07-01	5.9041
1999-10-01	4.6000
2000-01-01	4.7545
2000-04-01	3.2665
2000-07-01	6.6299
2000-10-01	2.1840
2001-01-01	9.4787
2001-04-01	14.9874
2001-07-01	9.0332
2001-10-01	11.1033
2002-01-01	12.4424
2002-04-01	10.7593
2002-07-01	10.1250
2002-10-01	8.1707
2003-01-01	13.6709
2003-04-01	16.1361
2003-07-01	10.8426
2003-10-01	11.1977
2004-01-01	7.8895
2004-04-01	12.7854
2004-07-01	11.3042
2004-10-01	14.4115
2005-01-01	12.0614
2005-04-01	7.8195
2005-07-01	9.3572
2005-10-01	13.0205
2006-01-01	17.2380
2006-04-01	12.0109
2006-07-01	13.8208
2006-10-01	24.0308
2007-01-01	29.7346
2007-04-01	27.9533
2007-07-01	16.7298
2007-10-01	22.7465
2008-01-01	29.5912
2008-04-01	59.6684
2008-07-01	26.3557
2008-10-01	13.2624
2009-01-01	23.9896
2009-04-01	37.1936
2009-07-01	24.8936
2009-10-01	28.7489
2010-01-01	28.0980
2010-04-01	39.2925
2010-07-01	46.0041
2010-10-01	26.7438
2011-01-01	34.4041
2011-04-01	38.0836
2011-07-01	31.6899
2011-10-01	31.7947
2012-01-01	44.9780
2012-04-01	19.4735
2012-07-01	27.9801
2012-10-01	26.3382
2013-01-01	22.4956
2013-04-01	30.6120
2013-07-01	57.3000
2013-10-01	36.0120
2014-01-01	39.7894
2014-04-01	36.1311
2014-07-01	38.4035
2014-10-01	29.3341
2015-01-01	58.6747
2015-04-01	32.9881