Quarter	Billions of US Dollars
1975-04-01	0.0534
1975-07-01	0.0784
1975-10-01	0.0784
1976-01-01	0.0784
1976-04-01	0.0784
1976-07-01	0.0784
1976-10-01	0.0784
1977-01-01	0.0784
1977-04-01	0.0784
1977-07-01	0.0784
1977-10-01	0.0784
1978-01-01	0.0784
1978-04-01	0.0784
1978-07-01	0.1034
1978-10-01	0.1034
1979-01-01	0.1512
1979-04-01	0.1845
1979-07-01	0.1832
1979-10-01	0.1801
1980-01-01	0.1784
1980-04-01	0.1844
1980-07-01	0.2657
1980-10-01	0.2921
1981-01-01	0.2845
1981-04-01	0.3041
1981-07-01	0.3048
1981-10-01	0.3110
1982-01-01	0.3012
1982-04-01	0.2972
1982-07-01	0.2681
1982-10-01	0.2781
1983-01-01	0.2754
1983-04-01	0.2732
1983-07-01	0.2721
1983-10-01	0.2711
1984-01-01	0.2747
1984-04-01	0.2679
1984-07-01	0.2622
1984-10-01	0.2593
1985-01-01	0.2594
1985-04-01	0.2608
1985-07-01	0.2399
1985-10-01	0.2465
1986-01-01	0.2315
1986-04-01	0.2407
1986-07-01	0.1772
1986-10-01	0.1163
1987-01-01	0.1220
1987-04-01	0.1214
1987-07-01	0.1217
1987-10-01	0.1344
1988-01-01	0.1331
1988-04-01	0.1289
1988-07-01	0.1277
1988-10-01	0.1329
1989-01-01	0.1291
1989-04-01	0.1228
1989-07-01	0.1252
1989-10-01	0.1231
1990-01-01	0.1170
1990-04-01	0.0654
1990-07-01	0.0726
1990-10-01	0.0744
1991-01-01	0.3200
1991-04-01	0.3200
1991-07-01	0.3200
1991-10-01	0.3200
1992-01-01	0.3200
1992-04-01	0.3200
1992-07-01	0.3200
1992-10-01	0.3200
1993-01-01	0.3200
1993-04-01	0.6526
1993-07-01	0.6526
1993-10-01	0.7526
1994-01-01	0.6419
1994-04-01	0.6419
1994-07-01	0.6419
1994-10-01	0.7419
1995-01-01	0.7419
1995-04-01	0.7419
1995-07-01	0.7419
1995-10-01	0.7419
1996-01-01	1.1719
1996-04-01	1.8919
1996-07-01	2.3319
1996-10-01	3.1319
1997-01-01	3.8819
1997-04-01	3.8819
1997-07-01	4.1819
1997-10-01	4.8319
1998-01-01	4.8319
1998-04-01	5.3319
1998-07-01	5.3319
1998-10-01	5.7449
1999-01-01	5.9449
1999-04-01	7.1449
1999-07-01	7.4406
1999-10-01	7.4283
2000-01-01	7.4184
2000-04-01	7.4185
2000-07-01	7.7027
2000-10-01	7.7135
2001-01-01	7.7040
2001-04-01	8.3019
2001-07-01	8.6711
2001-10-01	9.3147
2002-01-01	9.3130
2002-04-01	10.2372
2002-07-01	10.6020
2002-10-01	11.4491
2003-01-01	12.3976
2003-04-01	12.6729
2003-07-01	13.5441
2003-10-01	13.3300
2004-01-01	14.1532
2004-04-01	14.1497
2004-07-01	13.9055
2004-10-01	15.1419
2005-01-01	15.0396
2005-04-01	15.1635
2005-07-01	15.1060
2005-10-01	14.9060
2006-01-01	14.2492
2006-04-01	14.3492
2006-07-01	14.1492
2006-10-01	14.3492
2007-01-01	14.4827
2007-04-01	14.4827
2007-07-01	13.7956
2007-10-01	13.6106
2008-01-01	13.0016
2008-04-01	12.9310
2008-07-01	12.9203
2008-10-01	12.9135
2009-01-01	13.5032
2009-04-01	12.4524
2009-07-01	13.3086
2009-10-01	14.7620
2010-01-01	15.2571
2010-04-01	16.1369
2010-07-01	19.6038
2010-10-01	22.2157
2011-01-01	24.3446
2011-04-01	24.6370
2011-07-01	25.4854
2011-10-01	27.2142
2012-01-01	27.6345
2012-04-01	27.4129
2012-07-01	30.5178
2012-10-01	33.1966
2013-01-01	35.3105
2013-04-01	37.2978
2013-07-01	39.0676
2013-10-01	42.6482
2014-01-01	42.7365
2014-04-01	44.5604
2014-07-01	49.4265
2014-10-01	54.1620
2015-01-01	54.8362
2015-04-01	59.5328