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	0.2576
1984-10-01	0.2961
1985-01-01	0.4684
1985-04-01	0.4202
1985-07-01	0.5978
1985-10-01	0.5294
1986-01-01	0.7376
1986-04-01	1.0067
1986-07-01	1.1060
1986-10-01	1.1677
1987-01-01	1.4816
1987-04-01	1.4735
1987-07-01	1.4726
1987-10-01	1.9161
1988-01-01	2.2014
1988-04-01	2.1028
1988-07-01	2.2850
1988-10-01	2.6691
1989-01-01	2.9366
1989-04-01	2.9057
1989-07-01	3.2623
1989-10-01	3.4708
1990-01-01	3.6319
1990-04-01	3.8111
1990-07-01	4.2480
1990-10-01	4.7330
1991-01-01	4.4851
1991-04-01	4.4472
1991-07-01	4.7895
1991-10-01	6.0159
1992-01-01	6.1621
1992-04-01	6.5829
1992-07-01	7.1749
1992-10-01	6.5733
1993-01-01	7.9432
1993-04-01	8.6935
1993-07-01	10.2225
1993-10-01	10.2911
1994-01-01	11.7733
1994-04-01	12.3847
1994-07-01	13.1182
1994-10-01	13.8104
1995-01-01	15.0652
1995-04-01	16.1151
1995-07-01	15.5731
1995-10-01	15.8917
1996-01-01	15.3645
1996-04-01	14.9094
1996-07-01	14.2714
1996-10-01	13.4897
1997-01-01	12.6355
1997-04-01	12.8618
1997-07-01	12.3229
1997-10-01	11.4953
1998-01-01	10.9564
1998-04-01	10.8877
1998-07-01	11.7151
1998-10-01	12.4770
1999-01-01	11.6676
1999-04-01	12.6470
1999-07-01	12.6098
1999-10-01	12.5867
2000-01-01	11.4636
2000-04-01	10.9440
2000-07-01	10.1114
2000-10-01	10.4095
2001-01-01	9.8912
2001-04-01	10.6280
2001-07-01	11.1584
2001-10-01	10.1259
2002-01-01	9.6151
2002-04-01	10.3367
2002-07-01	10.0314
2002-10-01	10.4295
2003-01-01	11.1815
2003-04-01	11.2667
2003-07-01	11.9194
2003-10-01	12.4634
2004-01-01	11.9151
2004-04-01	12.1517
2004-07-01	13.1767
2004-10-01	16.2185
2005-01-01	18.1726
2005-04-01	18.2110
2005-07-01	18.6795
2005-10-01	18.5868
2006-01-01	22.4149
2006-04-01	22.1649
2006-07-01	24.2651
2006-10-01	27.2552
2007-01-01	30.2718
2007-04-01	31.5120
2007-07-01	33.0676
2007-10-01	34.3698
2008-01-01	38.0456
2008-04-01	41.3047
2008-07-01	38.2208
2008-10-01	37.2591
2009-01-01	33.9996
2009-04-01	35.5054
2009-07-01	38.2473
2009-10-01	38.2925
2010-01-01	37.2215
2010-04-01	34.8655
2010-07-01	36.2809
2010-10-01	35.1481
2011-01-01	39.4379
2011-04-01	40.3509
2011-07-01	38.6547
2011-10-01	36.3024
2012-01-01	36.8182
2012-04-01	34.8677
2012-07-01	35.4073
2012-10-01	35.5356
2013-01-01	36.0445
2013-04-01	36.8131
2013-07-01	38.1807
2013-10-01	41.7149
2014-01-01	43.2908
2014-04-01	41.6434
2014-07-01	36.6432
2014-10-01	37.5792
2015-01-01	34.1565
2015-04-01	35.3206