Quarter	Billions of US Dollars
1971-01-01	0.0456
1971-04-01	0.0306
1971-07-01	0.0306
1972-04-01	0.0315
1973-04-01	0.0143
1973-07-01	0.0413
1973-10-01	0.0350
1974-01-01	0.0317
1974-04-01	0.0925
1974-10-01	0.1733
1975-01-01	0.4168
1975-04-01	0.4427
1975-07-01	0.2309
1975-10-01	0.4560
1976-01-01	0.7656
1976-04-01	0.7286
1976-07-01	0.2204
1976-10-01	0.3717
1977-01-01	0.6027
1977-04-01	0.5655
1977-07-01	0.3401
1977-10-01	0.4468
1978-01-01	0.4929
1978-04-01	0.6322
1978-07-01	0.8147
1978-10-01	0.8113
1979-01-01	1.2864
1979-04-01	1.1848
1979-07-01	1.0008
1979-10-01	0.2734
1980-01-01	0.2985
1980-04-01	0.4472
1980-07-01	0.8656
1980-10-01	1.0587
1981-01-01	0.4200
1981-04-01	0.6643
1981-07-01	1.6405
1981-10-01	0.9215
1982-01-01	1.1704
1982-04-01	0.7995
1982-07-01	1.1513
1982-10-01	1.4987
1983-01-01	2.4908
1983-04-01	2.8267
1983-07-01	1.7393
1983-10-01	2.7642
1984-01-01	3.9670
1984-04-01	2.9037
1984-07-01	3.1766
1984-10-01	2.5232
1985-01-01	5.0342
1985-04-01	3.3652
1985-07-01	4.5496
1985-10-01	4.0644
1986-01-01	3.9925
1986-04-01	7.6270
1986-07-01	6.7083
1986-10-01	7.6692
1987-01-01	6.9352
1987-04-01	10.4504
1987-07-01	14.3296
1987-10-01	4.1053
1988-01-01	5.9568
1988-04-01	8.2399
1988-07-01	17.4055
1988-10-01	7.7061
1989-01-01	19.6007
1989-04-01	29.7104
1989-07-01	14.9331
1989-10-01	19.4891
1990-01-01	10.3986
1990-04-01	0.1867
1990-07-01	15.4964
1990-10-01	11.2297
1991-01-01	11.8204
1991-04-01	10.5003
1991-07-01	12.2730
1991-10-01	9.2078
1992-01-01	2.3936
1992-04-01	-0.1939
1992-07-01	-5.3057
1992-10-01	3.1486
1993-01-01	-14.3738
1993-04-01	-18.8710
1993-07-01	-9.5435
1993-10-01	-1.9650
1994-01-01	-0.7620
1994-04-01	-2.2799
1994-07-01	-0.5963
1994-10-01	-4.6730
1995-01-01	-1.0973
1995-04-01	0.5608
1995-07-01	-10.0214
1995-10-01	3.5855
1996-01-01	2.8632
1996-04-01	4.3178
1996-07-01	5.8052
1996-10-01	0.6203
1997-01-01	3.9447
1997-04-01	-0.8762
1997-07-01	6.4898
1997-10-01	-9.1402
1998-01-01	-5.4082
1998-04-01	-5.9434
1998-07-01	-4.7716
1998-10-01	-1.4644
1999-01-01	1.1622
1999-04-01	3.6858
1999-07-01	6.3147
1999-10-01	-7.4384
2000-01-01	-9.9665
2000-04-01	-0.8939
2000-07-01	-8.2938
2000-10-01	-7.8342
2001-01-01	-4.5210
2001-04-01	0.4550
2001-07-01	-6.1685
2001-10-01	-0.9942
2002-01-01	-7.5698
2002-04-01	0.9300
2002-07-01	-5.7332
2002-10-01	-10.0572
2003-01-01	-4.1654
2003-04-01	-1.5834
2003-07-01	-3.7867
2003-10-01	6.4247
2004-01-01	3.8844
2004-04-01	8.8730
2004-07-01	1.7658
2004-10-01	0.2134
2005-01-01	3.2012
2005-04-01	-3.7744
2005-07-01	1.5014
2005-10-01	0.7908
2006-01-01	10.3118
2006-04-01	9.4405
2006-07-01	6.6622
2006-10-01	10.4087
2007-01-01	5.5359
2007-04-01	7.5733
2007-07-01	5.1090
2007-10-01	7.1217
2008-01-01	-0.4929
2008-04-01	7.5736
2008-07-01	-0.7156
2008-10-01	-3.5210
2009-01-01	-1.4827
2009-04-01	-10.8757
2009-07-01	0.3226
2009-10-01	-2.1434
2010-01-01	-3.0944
2010-04-01	-16.1630
2010-07-01	7.5789
2010-10-01	-3.0755
2011-01-01	-0.2357
2011-04-01	-14.9967
2011-07-01	-5.8137
2011-10-01	-5.2332
2012-01-01	0.5693
2012-04-01	-6.1543
2012-07-01	13.4638
2012-10-01	0.6944
2013-01-01	8.9022
2013-04-01	6.1646
2013-07-01	15.9634
2013-10-01	9.4334
2014-01-01	8.6870
2014-04-01	6.5504
2014-07-01	13.2954
2014-10-01	6.6523
2015-01-01	11.0058
2015-04-01	4.8374