Quarter	Billions of US Dollars
1966-01-01	0.0056
1966-04-01	0.0056
1966-07-01	0.0056
1966-10-01	0.0056
1967-01-01	0.0056
1967-04-01	0.0056
1967-07-01	0.0056
1967-10-01	0.0048
1968-01-01	0.0048
1968-04-01	0.0095
1968-07-01	0.0096
1968-10-01	0.0095
1969-01-01	0.0096
1969-04-01	0.0096
1969-07-01	0.0095
1969-10-01	0.0096
1970-01-01	0.0096
1970-04-01	0.0096
1970-07-01	0.0096
1970-10-01	0.0096
1971-01-01	0.0197
1971-04-01	0.0197
1971-07-01	0.0199
1971-10-01	0.0202
1972-01-01	0.0355
1972-04-01	0.0414
1972-07-01	0.0413
1972-10-01	0.0510
1973-01-01	0.0526
1973-04-01	0.0538
1973-07-01	0.0583
1973-10-01	0.0568
1974-01-01	0.0580
1974-04-01	0.0672
1974-07-01	0.0669
1974-10-01	0.0688
1975-01-01	0.0693
1975-04-01	0.0684
1975-07-01	0.0728
1975-10-01	0.0868
1976-01-01	0.0868
1976-04-01	0.0864
1976-07-01	0.0865
1976-10-01	0.0870
1977-01-01	0.1275
1977-04-01	0.1434
1977-07-01	0.1449
1977-10-01	0.1672
1978-01-01	0.1926
1978-04-01	0.1939
1978-07-01	0.2075
1978-10-01	0.2076
1979-01-01	0.2138
1979-04-01	0.2141
1979-07-01	0.2902
1979-10-01	0.2894
1980-01-01	0.2734
1980-04-01	0.2907
1980-07-01	0.2882
1980-10-01	0.2801
1981-01-01	0.3021
1981-04-01	0.2822
1981-07-01	0.2808
1981-10-01	0.2879
1982-01-01	0.2897
1982-04-01	0.3330
1982-07-01	0.3256
1982-10-01	0.3240
1983-01-01	0.3727
1983-04-01	0.3925
1983-07-01	0.3886
1983-10-01	0.4061
1984-01-01	0.4129
1984-04-01	0.3860
1984-07-01	0.3735
1984-10-01	0.3637
1985-01-01	0.3674
1985-04-01	0.3714
1985-07-01	0.5250
1985-10-01	0.5799
1986-01-01	0.5970
1986-04-01	0.6623
1986-07-01	0.6724
1986-10-01	0.6523
1987-01-01	0.7300
1987-04-01	0.7174
1987-07-01	0.7113
1987-10-01	0.7587
1988-01-01	0.7254
1988-04-01	0.6937
1988-07-01	0.6807
1988-10-01	0.6948
1989-01-01	0.7413
1989-04-01	0.8075
1989-07-01	0.8254
1989-10-01	0.8282
1990-01-01	0.7861
1990-04-01	0.7962
1990-07-01	0.8297
1990-10-01	0.8392
1991-01-01	0.7886
1991-04-01	0.9032
1991-07-01	0.9340
1991-10-01	0.9629
1992-01-01	1.0351
1992-04-01	1.0121
1992-07-01	1.1242
1992-10-01	1.0297
1993-01-01	1.0678
1993-04-01	1.2445
1993-07-01	1.2589
1993-10-01	1.2125
1994-01-01	1.4813
1994-04-01	1.3529
1994-07-01	1.4257
1994-10-01	1.5397
1995-01-01	1.8130
1995-04-01	1.8323
1995-07-01	1.7604
1995-10-01	1.7192
1996-01-01	1.6880
1996-04-01	1.7452
1996-07-01	1.8056
1996-10-01	1.8207
1997-01-01	1.7566
1997-04-01	1.7212
1997-07-01	1.6938
1997-10-01	1.6732
1998-01-01	1.7284
1998-04-01	1.7213
1998-07-01	1.7040
1998-10-01	1.7659
1999-01-01	1.7166
1999-04-01	1.9256
1999-07-01	2.1071
1999-10-01	2.0955
2000-01-01	2.3847
2000-04-01	2.6373
2000-07-01	2.6649
2000-10-01	3.2098
2001-01-01	3.2146
2001-04-01	3.2418
2001-07-01	3.3831
2001-10-01	3.6468
2002-01-01	3.8543
2002-04-01	4.8657
2002-07-01	4.8894
2002-10-01	4.6622
2003-01-01	4.8257
2003-04-01	5.5541
2003-07-01	6.6201
2003-10-01	8.2940
2004-01-01	9.9851
2004-04-01	10.7758
2004-07-01	14.5720
2004-10-01	19.3772
2005-01-01	22.4908
2005-04-01	25.3590
2005-07-01	29.1593
2005-10-01	32.2689
2006-01-01	35.0266
2006-04-01	37.7489
2006-07-01	40.4603
2006-10-01	46.4111
2007-01-01	48.5999
2007-04-01	50.7573
2007-07-01	51.9813
2007-10-01	54.4441
2008-01-01	57.3609
2008-04-01	59.9604
2008-07-01	54.6557
2008-10-01	51.4906
2009-01-01	47.1993
2009-04-01	45.9175
2009-07-01	45.1729
2009-10-01	41.6843
2010-01-01	36.8912
2010-04-01	32.9419
2010-07-01	34.9931
2010-10-01	32.0579
2011-01-01	31.8838
2011-04-01	32.1403
2011-07-01	28.9902
2011-10-01	24.8616
2012-01-01	22.9466
2012-04-01	21.2314
2012-07-01	19.5125
2012-10-01	18.9800
2013-01-01	18.6334
2013-04-01	18.6461
2013-07-01	18.6392
2013-10-01	18.6592
2014-01-01	18.5490
2014-04-01	18.1563
2014-07-01	18.3000
2014-10-01	17.6319
2015-01-01	16.6770
2015-04-01	16.6599