Quarter	Billions of US Dollars
1971-10-01	0.0306
1972-01-01	0.0815
1972-04-01	0.0400
1972-07-01	0.0200
1972-10-01	0.0350
1973-01-01	0.0613
1973-07-01	0.0507
1973-10-01	0.0657
1974-10-01	0.0500
1975-01-01	0.1325
1975-04-01	0.0772
1975-07-01	0.0240
1975-10-01	0.0618
1976-01-01	0.0617
1976-04-01	0.1431
1976-07-01	0.0906
1976-10-01	0.0811
1977-01-01	0.1205
1977-04-01	0.3059
1977-07-01	0.4696
1977-10-01	0.4918
1978-01-01	0.4633
1978-04-01	0.1242
1978-07-01	0.1000
1978-10-01	0.1000
1979-01-01	0.0650
1979-07-01	0.1730
1979-10-01	0.0065
1980-01-01	-0.0368
1980-04-01	0.2010
1980-07-01	0.0250
1980-10-01	0.0752
1981-01-01	0.0750
1981-04-01	0.5392
1981-07-01	0.4204
1981-10-01	0.7900
1982-01-01	0.6286
1982-04-01	0.1324
1982-07-01	0.0912
1982-10-01	-0.0867
1983-01-01	-0.1985
1983-04-01	-0.0961
1983-07-01	-0.0671
1983-10-01	-0.1598
1984-01-01	-0.0444
1984-04-01	-0.0738
1984-07-01	-0.1528
1984-10-01	-0.0250
1985-01-01	-0.0614
1985-04-01	-0.0391
1985-07-01	-0.1340
1985-10-01	-0.3129
1986-04-01	-0.1507
1986-07-01	-0.1103
1986-10-01	-0.3615
1987-01-01	-0.2714
1987-04-01	-0.1945
1987-07-01	-0.0309
1987-10-01	-0.3045
1988-01-01	-0.2411
1988-04-01	-0.3527
1988-07-01	-0.5633
1988-10-01	-0.3972
1989-01-01	-0.1508
1989-04-01	-0.0487
1989-07-01	-0.0854
1989-10-01	0.0310
1990-01-01	35.3472
1990-04-01	0.4975
1990-07-01	0.7630
1990-10-01	0.2230
1991-01-01	0.3393
1991-04-01	0.9750
1991-07-01	0.4671
1991-10-01	0.7906
1992-01-01	0.1922
1992-04-01	0.0762
1992-07-01	0.4894
1992-10-01	2.2021
1993-01-01	0.5884
1993-04-01	2.1511
1993-07-01	0.4844
1993-10-01	1.5790
1994-01-01	3.8115
1994-04-01	1.0638
1994-07-01	0.8384
1994-10-01	0.1387
1995-01-01	-1.1012
1995-04-01	0.3832
1995-07-01	2.1297
1995-10-01	1.1091
1996-01-01	2.7770
1996-04-01	-0.6315
1996-07-01	8.1903
1996-10-01	0.7679
1997-01-01	2.7279
1997-04-01	5.3086
1997-07-01	-3.5217
1997-10-01	-0.0095
1998-01-01	1.7170
1998-04-01	-0.1489
1998-07-01	0.3482
1998-10-01	-0.4072
1999-01-01	0.1298
1999-04-01	4.3399
1999-07-01	0.2591
1999-10-01	1.2093
2000-01-01	3.0751
2000-04-01	-0.3958
2000-07-01	1.2270
2000-10-01	-2.5691
2001-01-01	5.1745
2001-04-01	-4.1957
2001-07-01	1.3480
2001-10-01	-5.5153
2002-01-01	-0.1119
2002-04-01	-5.1878
2002-07-01	-0.2557
2002-10-01	0.9211
2003-01-01	-8.2977
2003-04-01	-3.1280
2003-07-01	-3.8797
2003-10-01	1.0375
2004-01-01	1.1887
2004-04-01	-0.8465
2004-07-01	0.2084
2004-10-01	0.0365
2005-01-01	2.7536
2005-04-01	0.6715
2005-07-01	0.1456
2005-10-01	0.7572
2006-01-01	0.6693
2006-04-01	-1.2427
2006-07-01	-1.2941
2006-10-01	0.8482
2007-01-01	-0.4157
2007-04-01	0.5239
2007-07-01	0.5678
2007-10-01	1.7675
2008-01-01	-0.9986
2008-04-01	-0.6578
2008-07-01	-0.5655
2008-10-01	-1.4571
2009-01-01	-1.2366
2009-04-01	2.7908
2009-07-01	4.0956
2009-10-01	8.3521
2010-01-01	4.6383
2010-04-01	7.2198
2010-07-01	3.5938
2010-10-01	0.4974
2011-01-01	4.5831
2011-04-01	5.4530
2011-07-01	5.6713
2011-10-01	4.7287
2012-01-01	7.1562
2012-04-01	2.5491
2012-07-01	9.5448
2012-10-01	6.5995
2013-01-01	3.8834
2013-04-01	5.6637
2013-07-01	10.3542
2013-10-01	15.3570
2014-01-01	7.0629
2014-04-01	10.7775
2014-07-01	3.7010
2014-10-01	6.3925
2015-01-01	7.9282
2015-04-01	8.5558