Quarter	Billions of US Dollars
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	0.0671
1974-07-01	0.0670
1974-10-01	0.0673
1975-01-01	0.0675
1975-04-01	0.0675
1975-07-01	0.0669
1975-10-01	0.0670
1976-01-01	0.0671
1976-04-01	0.0670
1976-07-01	0.4344
1976-10-01	0.4459
1977-01-01	0.4836
1977-04-01	0.5211
1977-07-01	0.5648
1977-10-01	0.5738
1978-01-01	0.6970
1978-04-01	0.7043
1978-07-01	0.7474
1978-10-01	0.8273
1979-01-01	0.8392
1979-04-01	0.8621
1979-07-01	0.9644
1979-10-01	0.9501
1980-01-01	0.9245
1980-04-01	0.9699
1980-07-01	1.0426
1980-10-01	1.0456
1981-01-01	1.0238
1981-04-01	0.9895
1981-07-01	0.9839
1981-10-01	1.0614
1982-01-01	1.0436
1982-04-01	1.0303
1982-07-01	1.0088
1982-10-01	1.0597
1983-01-01	1.0331
1983-04-01	1.0286
1983-07-01	1.0307
1983-10-01	1.0333
1984-01-01	1.0276
1984-04-01	1.0011
1984-07-01	0.9495
1984-10-01	0.9399
1985-01-01	0.9062
1985-04-01	0.9112
1985-07-01	0.9624
1985-10-01	0.9361
1986-01-01	0.9644
1986-04-01	1.0016
1986-07-01	0.9361
1986-10-01	0.8351
1987-01-01	0.8706
1987-04-01	0.7991
1987-07-01	0.7879
1987-10-01	0.8543
1988-01-01	0.7383
1988-04-01	0.7203
1988-07-01	0.6822
1988-10-01	0.6525
1989-01-01	0.5829
1989-04-01	0.5595
1989-07-01	0.4983
1989-10-01	0.4906
1990-01-01	0.4681
1990-04-01	1.3116
1990-07-01	1.2510
1990-10-01	1.2556
1991-01-01	1.2469
1991-04-01	1.2509
1991-07-01	1.2578
1991-10-01	1.1495
1992-01-01	0.9375
1992-04-01	0.9421
1992-07-01	0.9463
1992-10-01	4.2908
1993-01-01	4.4466
1993-04-01	4.4543
1993-07-01	4.7307
1993-10-01	5.4252
1994-01-01	5.5855
1994-04-01	5.9977
1994-07-01	6.3107
1994-10-01	6.6444
1995-01-01	6.6493
1995-04-01	6.6194
1995-07-01	7.1700
1995-10-01	7.4319
1996-01-01	7.3975
1996-04-01	8.3339
1996-07-01	9.2642
1996-10-01	11.1354
1997-01-01	12.1846
1997-04-01	13.2160
1997-07-01	14.3408
1997-10-01	13.9790
1998-01-01	14.7988
1998-04-01	15.4412
1998-07-01	15.0244
1998-10-01	14.6281
1999-01-01	15.7882
1999-04-01	16.5202
1999-07-01	17.6666
1999-10-01	18.0397
2000-01-01	19.5634
2000-04-01	19.1584
2000-07-01	19.2006
2000-10-01	18.6938
2001-01-01	17.6741
2001-04-01	17.9223
2001-07-01	17.7918
2001-10-01	18.6582
2002-01-01	20.2771
2002-04-01	21.3703
2002-07-01	21.6786
2002-10-01	22.6031
2003-01-01	23.8478
2003-04-01	24.7199
2003-07-01	25.3700
2003-10-01	26.6753
2004-01-01	26.9522
2004-04-01	27.0213
2004-07-01	27.9837
2004-10-01	28.0643
2005-01-01	29.2883
2005-04-01	29.8250
2005-07-01	30.7281
2005-10-01	29.5315
2006-01-01	32.0101
2006-04-01	31.4175
2006-07-01	32.8806
2006-10-01	32.0662
2007-01-01	33.2005
2007-04-01	33.0394
2007-07-01	32.7860
2007-10-01	32.4449
2008-01-01	33.0016
2008-04-01	31.8758
2008-07-01	31.8893
2008-10-01	31.7771
2009-01-01	32.1587
2009-04-01	33.1207
2009-07-01	34.5191
2009-10-01	36.1819
2010-01-01	37.1357
2010-04-01	37.1745
2010-07-01	38.7704
2010-10-01	39.9168
2011-01-01	41.9301
2011-04-01	43.0938
2011-07-01	42.6853
2011-10-01	41.6515
2012-01-01	43.8981
2012-04-01	44.3320
2012-07-01	44.1838
2012-10-01	45.1527
2013-01-01	45.1715
2013-04-01	46.2585
2013-07-01	45.8954
2013-10-01	46.1956
2014-01-01	45.9908
2014-04-01	46.8223
2014-07-01	46.1795
2014-10-01	46.0352
2015-01-01	48.5230
2015-04-01	48.6603