Quarter	Billions of US Dollars
1969-10-01	0.0500
1970-01-01	0.0274
1971-01-01	0.0100
1972-04-01	0.0259
1973-04-01	0.0156
1974-01-01	0.0049
1974-04-01	0.0199
1975-07-01	0.0192
1976-07-01	0.0747
1976-10-01	0.0750
1977-01-01	0.0396
1977-04-01	0.0207
1977-07-01	0.1247
1978-01-01	0.0212
1978-07-01	0.0172
1979-01-01	0.0292
1979-07-01	0.9317
1979-10-01	0.5069
1980-04-01	0.1266
1980-10-01	0.0248
1981-01-01	0.1255
1981-04-01	0.0178
1981-07-01	0.0531
1981-10-01	0.1534
1982-01-01	0.0533
1982-04-01	0.0610
1982-07-01	0.0380
1982-10-01	0.0572
1983-01-01	0.2011
1983-04-01	0.0500
1983-07-01	0.0986
1983-10-01	0.4648
1984-01-01	0.1435
1984-04-01	0.4877
1984-07-01	0.4489
1984-10-01	0.5378
1985-01-01	0.5212
1985-04-01	1.1460
1985-07-01	0.4116
1985-10-01	0.6221
1986-01-01	1.0939
1986-04-01	1.1120
1986-07-01	1.0848
1986-10-01	0.5128
1987-01-01	0.9152
1987-04-01	1.2382
1987-07-01	0.6310
1987-10-01	0.6602
1988-01-01	1.2894
1988-04-01	0.6319
1988-07-01	0.5165
1988-10-01	0.5915
1989-01-01	0.8201
1989-04-01	0.9539
1989-07-01	0.7123
1989-10-01	1.4773
1990-01-01	1.7718
1990-04-01	1.6815
1990-07-01	1.6340
1990-10-01	1.0098
1991-01-01	4.3101
1991-04-01	2.3878
1991-07-01	2.3338
1991-10-01	1.9739
1992-01-01	3.5748
1992-04-01	1.3473
1992-07-01	1.5079
1992-10-01	2.3504
1993-01-01	2.8756
1993-04-01	1.7916
1993-07-01	2.4803
1993-10-01	3.1509
1994-01-01	3.2072
1994-04-01	3.9305
1994-07-01	3.1956
1994-10-01	3.1846
1995-01-01	4.3897
1995-04-01	3.7343
1995-07-01	3.7243
1995-10-01	4.4704
1996-01-01	4.0867
1996-04-01	4.3637
1996-07-01	5.6098
1996-10-01	3.5535
1997-01-01	5.8558
1997-04-01	3.3575
1997-07-01	4.0489
1997-10-01	3.5409
1998-01-01	3.7105
1998-04-01	2.6410
1998-07-01	1.6473
1998-10-01	2.2254
1999-01-01	6.2098
1999-04-01	5.8008
1999-07-01	1.8825
1999-10-01	5.4023
2000-01-01	5.2667
2000-04-01	3.9709
2000-07-01	2.9861
2000-10-01	4.0475
2001-01-01	11.8472
2001-04-01	8.4243
2001-07-01	4.4649
2001-10-01	5.0633
2002-01-01	10.8591
2002-04-01	7.5413
2002-07-01	4.9782
2002-10-01	2.5597
2003-01-01	8.5246
2003-04-01	5.2688
2003-07-01	4.0299
2003-10-01	6.8868
2004-01-01	9.9304
2004-04-01	4.8760
2004-07-01	10.9071
2004-10-01	8.7984
2005-01-01	11.5812
2005-04-01	13.7706
2005-07-01	6.5853
2005-10-01	9.0546
2006-01-01	15.1705
2006-04-01	10.0961
2006-07-01	7.5139
2006-10-01	24.2469
2007-01-01	19.8870
2007-04-01	25.0830
2007-07-01	16.3213
2007-10-01	20.4679
2008-01-01	16.4318
2008-04-01	31.4087
2008-07-01	12.4633
2008-10-01	30.1134
2009-01-01	25.8630
2009-04-01	28.6714
2009-07-01	16.8840
2009-10-01	15.8633
2010-01-01	38.4845
2010-04-01	25.7549
2010-07-01	14.7979
2010-10-01	7.5316
2011-01-01	11.0070
2011-04-01	12.3771
2011-07-01	2.1976
2011-10-01	2.2390
2012-01-01	6.2387
2012-04-01	8.0610
2012-07-01	14.7030
2012-10-01	4.7458
2013-01-01	10.3139
2013-04-01	4.6175
2013-07-01	16.1675
2013-10-01	39.0589
2014-01-01	19.0659
2014-04-01	10.2881
2014-07-01	15.6340
2014-10-01	7.4809
2015-01-01	17.9825
2015-04-01	10.8868