Quarter	Billions of US Dollars
1972-07-01	0.0500
1972-10-01	0.0500
1973-01-01	0.0500
1973-04-01	0.0500
1973-07-01	0.0500
1973-10-01	0.0500
1974-01-01	0.0500
1974-04-01	0.0500
1974-07-01	0.0500
1974-10-01	0.0500
1975-01-01	0.0500
1975-04-01	0.0925
1975-07-01	0.0876
1975-10-01	0.0881
1976-01-01	0.1144
1976-04-01	0.1138
1976-07-01	0.1160
1976-10-01	0.1173
1977-01-01	0.1469
1977-04-01	0.1478
1977-07-01	0.2483
1977-10-01	0.3000
1978-01-01	0.3039
1978-04-01	0.3014
1978-07-01	0.3082
1978-10-01	0.3144
1979-01-01	0.3121
1979-04-01	0.3132
1979-07-01	0.3198
1979-10-01	0.3205
1980-01-01	0.2830
1980-04-01	0.3438
1980-07-01	0.3404
1980-10-01	0.3321
1981-01-01	0.2952
1981-04-01	0.2418
1981-07-01	0.2431
1981-10-01	0.2443
1982-01-01	0.2414
1982-04-01	0.2407
1982-07-01	0.2396
1982-10-01	0.2421
1983-01-01	0.2412
1983-04-01	0.2393
1983-07-01	0.2379
1983-10-01	0.2367
1984-01-01	0.2386
1984-04-01	0.2359
1984-07-01	0.2331
1984-10-01	0.2716
1985-01-01	0.4439
1985-04-01	0.3957
1985-07-01	0.5733
1985-10-01	0.5049
1986-01-01	0.6876
1986-04-01	0.9567
1986-07-01	1.0560
1986-10-01	1.1177
1987-01-01	1.4316
1987-04-01	1.4235
1987-07-01	1.4226
1987-10-01	1.8661
1988-01-01	2.1514
1988-04-01	2.0528
1988-07-01	2.2350
1988-10-01	2.6191
1989-01-01	2.8866
1989-04-01	2.8557
1989-07-01	3.2123
1989-10-01	3.4208
1990-01-01	3.5819
1990-04-01	3.7611
1990-07-01	4.2180
1990-10-01	4.7030
1991-01-01	4.4551
1991-04-01	4.4172
1991-07-01	4.7595
1991-10-01	5.9859
1992-01-01	6.1491
1992-04-01	6.5699
1992-07-01	7.1619
1992-10-01	6.5733
1993-01-01	7.9432
1993-04-01	8.6935
1993-07-01	10.1607
1993-10-01	10.2332
1994-01-01	11.7135
1994-04-01	12.3220
1994-07-01	13.0536
1994-10-01	13.6489
1995-01-01	14.8845
1995-04-01	15.9344
1995-07-01	15.3969
1995-10-01	15.7173
1996-01-01	15.1951
1996-04-01	14.7452
1996-07-01	14.1076
1996-10-01	13.3289
1997-01-01	12.4865
1997-04-01	12.7184
1997-07-01	12.1813
1997-10-01	11.3558
1998-01-01	10.8210
1998-04-01	10.6150
1998-07-01	11.2716
1998-10-01	12.0885
1999-01-01	11.3106
1999-04-01	12.3038
1999-07-01	12.3886
1999-10-01	12.3784
2000-01-01	11.2656
2000-04-01	10.7458
2000-07-01	9.9409
2000-10-01	10.2285
2001-01-01	9.7194
2001-04-01	10.4630
2001-07-01	10.9924
2001-10-01	10.0332
2002-01-01	9.4518
2002-04-01	10.1926
2002-07-01	9.8881
2002-10-01	10.2743
2003-01-01	11.0245
2003-04-01	10.7085
2003-07-01	11.3540
2003-10-01	11.8873
2004-01-01	11.3396
2004-04-01	11.9790
2004-07-01	12.8434
2004-10-01	15.4425
2005-01-01	17.5396
2005-04-01	17.6206
2005-07-01	18.2763
2005-10-01	18.1327
2006-01-01	22.6874
2006-04-01	22.5005
2006-07-01	24.6642
2006-10-01	27.5357
2007-01-01	30.5552
2007-04-01	31.6987
2007-07-01	33.1343
2007-10-01	34.0574
2008-01-01	37.7039
2008-04-01	41.3505
2008-07-01	38.2662
2008-10-01	37.3067
2009-01-01	34.0484
2009-04-01	35.6751
2009-07-01	38.4219
2009-10-01	39.2323
2010-01-01	38.1035
2010-04-01	35.6731
2010-07-01	37.1911
2010-10-01	36.1515
2011-01-01	40.5023
2011-04-01	41.6479
2011-07-01	39.8866
2011-10-01	37.5160
2012-01-01	38.2244
2012-04-01	36.3356
2012-07-01	37.4061
2012-10-01	37.6228
2013-01-01	38.0974
2013-04-01	38.8897
2013-07-01	40.2955
2013-10-01	43.8393
2014-01-01	45.6249
2014-04-01	43.8925
2014-07-01	38.7896
2014-10-01	39.6368
2015-01-01	36.0764
2015-04-01	42.9420