Quarter	Billions of US Dollars
1968-01-01	0.0600
1968-04-01	0.0600
1972-01-01	0.0465
1972-04-01	0.1026
1972-10-01	0.0300
1973-01-01	0.0370
1973-10-01	0.0984
1974-01-01	0.0195
1974-04-01	0.0232
1974-07-01	0.0334
1974-10-01	0.0332
1975-01-01	0.0877
1975-04-01	0.0614
1975-07-01	0.0999
1975-10-01	0.0288
1976-01-01	0.0667
1976-04-01	0.1089
1976-07-01	0.0308
1976-10-01	0.0992
1977-01-01	0.0354
1977-04-01	0.3416
1977-07-01	0.0333
1977-10-01	0.0114
1978-01-01	0.1661
1978-04-01	0.2017
1978-07-01	0.1192
1978-10-01	0.0693
1979-01-01	0.0566
1979-04-01	0.0641
1979-07-01	0.0376
1979-10-01	-0.0246
1980-01-01	-0.0120
1980-04-01	-0.0047
1980-07-01	0.0856
1980-10-01	0.0649
1981-01-01	-0.0105
1981-04-01	0.1136
1981-07-01	0.0919
1981-10-01	0.0141
1982-01-01	0.1041
1982-04-01	0.0274
1982-07-01	0.4849
1982-10-01	0.3957
1983-01-01	1.0223
1983-04-01	0.6945
1983-07-01	0.0050
1983-10-01	0.7849
1984-01-01	0.8830
1984-04-01	0.2225
1984-07-01	0.4828
1984-10-01	0.5529
1985-01-01	0.5162
1985-04-01	0.5564
1985-07-01	0.8852
1985-10-01	0.8680
1986-01-01	1.7020
1986-04-01	3.7021
1986-07-01	2.2974
1986-10-01	2.0710
1987-01-01	3.2589
1987-04-01	1.7415
1987-07-01	2.2212
1987-10-01	0.8289
1988-01-01	2.0465
1988-04-01	1.9254
1988-07-01	2.2659
1988-10-01	2.3703
1989-01-01	1.8242
1989-04-01	2.7636
1989-07-01	1.5055
1989-10-01	1.2306
1990-01-01	2.0228
1990-04-01	1.3020
1990-07-01	1.5672
1990-10-01	0.2574
1991-01-01	1.3078
1991-04-01	2.0384
1991-07-01	1.5197
1991-10-01	4.2522
1992-01-01	2.8219
1992-04-01	3.8573
1992-07-01	2.7276
1992-10-01	3.6631
1993-01-01	5.6923
1993-04-01	5.9037
1993-07-01	5.8051
1993-10-01	7.4640
1994-01-01	12.0570
1994-04-01	4.9128
1994-07-01	6.8889
1994-10-01	11.3067
1995-01-01	10.1295
1995-04-01	13.5510
1995-07-01	12.9727
1995-10-01	14.2562
1996-01-01	20.2072
1996-04-01	15.1940
1996-07-01	14.8767
1996-10-01	20.5434
1997-01-01	25.9820
1997-04-01	19.3280
1997-07-01	13.8469
1997-10-01	7.4550
1998-01-01	23.9976
1998-04-01	23.9827
1998-07-01	15.2326
1998-10-01	-0.4885
1999-01-01	30.3587
1999-04-01	25.0569
1999-07-01	36.6471
1999-10-01	8.0791
2000-01-01	32.6464
2000-04-01	26.8083
2000-07-01	37.6415
2000-10-01	32.2232
2001-01-01	51.8497
2001-04-01	37.4371
2001-07-01	27.7961
2001-10-01	27.9914
2002-01-01	37.9223
2002-04-01	42.4718
2002-07-01	24.0695
2002-10-01	22.5218
2003-01-01	27.6106
2003-04-01	44.6501
2003-07-01	32.1350
2003-10-01	29.3611
2004-01-01	50.0427
2004-04-01	39.7746
2004-07-01	63.9611
2004-10-01	34.1914
2005-01-01	60.4864
2005-04-01	63.0155
2005-07-01	1.1360
2005-10-01	47.8483
2006-01-01	62.0241
2006-04-01	55.8708
2006-07-01	50.9335
2006-10-01	50.1075
2007-01-01	39.2864
2007-04-01	41.8316
2007-07-01	-8.3351
2007-10-01	1.1060
2008-01-01	-1.5404
2008-04-01	29.3153
2008-07-01	-14.3255
2008-10-01	39.9954
2009-01-01	7.4797
2009-04-01	13.4755
2009-07-01	-21.1101
2009-10-01	-15.2390
2010-01-01	-3.2235
2010-04-01	-24.1078
2010-07-01	-1.8711
2010-10-01	-39.4454
2011-01-01	-21.3228
2011-04-01	-2.4314
2011-07-01	-0.7573
2011-10-01	12.7662
2012-01-01	19.1641
2012-04-01	-0.6914
2012-07-01	-7.7718
2012-10-01	21.1423
2013-01-01	-20.6039
2013-04-01	-14.6314
2013-07-01	-26.3451
2013-10-01	5.5612
2014-01-01	-25.6267
2014-04-01	13.4049
2014-07-01	-3.6682
2014-10-01	14.3783
2015-01-01	-20.5944
2015-04-01	10.4468