Quarter	Billions of US Dollars
1967-04-01	0.0250
1968-04-01	0.0300
1968-10-01	0.0200
1971-01-01	0.0556
1971-04-01	0.0700
1972-10-01	0.0998
1973-01-01	0.0121
1974-04-01	0.0500
1974-07-01	0.0103
1974-10-01	0.0317
1975-01-01	0.0341
1975-04-01	0.0170
1975-10-01	0.0189
1976-01-01	0.0600
1976-04-01	0.1400
1976-10-01	0.0250
1977-01-01	0.0876
1977-04-01	0.1970
1977-10-01	0.1196
1978-01-01	0.0262
1978-04-01	0.1232
1978-07-01	0.0077
1978-10-01	0.0260
1979-01-01	0.2658
1979-04-01	0.2591
1979-07-01	0.1000
1979-10-01	0.0364
1980-01-01	0.2500
1980-04-01	0.4100
1980-07-01	0.2907
1980-10-01	0.1438
1981-01-01	0.3769
1981-04-01	0.0247
1981-07-01	0.0689
1981-10-01	0.4388
1982-01-01	0.9237
1982-04-01	0.3582
1982-07-01	0.0750
1982-10-01	0.7203
1983-01-01	0.2521
1983-04-01	0.2778
1983-07-01	0.1247
1983-10-01	1.1117
1984-01-01	0.7693
1984-04-01	0.3040
1984-07-01	0.7660
1984-10-01	2.0166
1985-01-01	1.1962
1985-04-01	2.0889
1985-07-01	0.9773
1985-10-01	0.9897
1986-01-01	1.4068
1986-04-01	2.0794
1986-07-01	1.0753
1986-10-01	1.1322
1987-01-01	0.5161
1987-04-01	1.3255
1987-07-01	1.2602
1987-10-01	3.9249
1988-01-01	1.9468
1988-04-01	1.0794
1988-07-01	2.8989
1988-10-01	1.2790
1989-01-01	2.3077
1989-04-01	2.2791
1989-07-01	0.8053
1989-10-01	3.4702
1990-01-01	4.0240
1990-04-01	2.6347
1990-07-01	1.4030
1990-10-01	4.3652
1991-01-01	6.2825
1991-04-01	1.5953
1991-07-01	1.0493
1991-10-01	1.3252
1992-01-01	5.0129
1992-04-01	2.7821
1992-07-01	0.6045
1992-10-01	0.4214
1993-01-01	4.8201
1993-04-01	3.3298
1993-07-01	11.1322
1993-10-01	3.4320
1994-01-01	5.7052
1994-04-01	2.7278
1994-07-01	6.5138
1994-10-01	9.1964
1995-01-01	3.3863
1995-04-01	9.1554
1995-07-01	5.6144
1995-10-01	5.2648
1996-01-01	4.3272
1996-04-01	8.8869
1996-07-01	6.1493
1996-10-01	6.8414
1997-01-01	8.8356
1997-04-01	10.9040
1997-07-01	6.0783
1997-10-01	4.2570
1998-01-01	8.5584
1998-04-01	11.5603
1998-07-01	6.3869
1998-10-01	6.8851
1999-01-01	15.3924
1999-04-01	27.5122
1999-07-01	17.6100
1999-10-01	15.5580
2000-01-01	20.1913
2000-04-01	19.3015
2000-07-01	23.4364
2000-10-01	13.4144
2001-01-01	32.7158
2001-04-01	30.6831
2001-07-01	16.1248
2001-10-01	32.4094
2002-01-01	19.9514
2002-04-01	16.4875
2002-07-01	16.6416
2002-10-01	25.0323
2003-01-01	30.7265
2003-04-01	27.7663
2003-07-01	23.9803
2003-10-01	40.0670
2004-01-01	43.6574
2004-04-01	49.0060
2004-07-01	25.8347
2004-10-01	39.3265
2005-01-01	41.7891
2005-04-01	59.3415
2005-07-01	19.7823
2005-10-01	43.6286
2006-01-01	44.9015
2006-04-01	55.9705
2006-07-01	38.5004
2006-10-01	57.1008
2007-01-01	44.1108
2007-04-01	67.5966
2007-07-01	20.8596
2007-10-01	29.1516
2008-01-01	40.7148
2008-04-01	70.7461
2008-07-01	44.4502
2008-10-01	99.5823
2009-01-01	49.5801
2009-04-01	46.5087
2009-07-01	68.3850
2009-10-01	60.8643
2010-01-01	33.3200
2010-04-01	25.6726
2010-07-01	43.6019
2010-10-01	47.9493
2011-01-01	65.9047
2011-04-01	52.5226
2011-07-01	32.7190
2011-10-01	38.9504
2012-01-01	36.2576
2012-04-01	18.5040
2012-07-01	26.0106
2012-10-01	48.9151
2013-01-01	24.5704
2013-04-01	26.6003
2013-07-01	39.3649
2013-10-01	49.6710
2014-01-01	45.0596
2014-04-01	51.5044
2014-07-01	22.7348
2014-10-01	24.5929
2015-01-01	43.4786
2015-04-01	16.6152