Quarter	Billions of US Dollars
1968-07-01	0.0400
1969-01-01	0.0950
1969-04-01	0.0150
1969-07-01	0.0200
1971-10-01	0.0150
1972-01-01	0.0200
1972-04-01	0.0949
1972-07-01	0.2335
1972-10-01	0.0716
1973-01-01	0.1855
1973-04-01	0.1055
1973-07-01	0.0569
1973-10-01	0.0924
1974-01-01	0.0189
1974-04-01	0.1046
1974-07-01	0.1815
1974-10-01	0.3058
1975-01-01	0.2143
1975-04-01	0.2577
1975-07-01	0.1674
1975-10-01	0.0836
1976-01-01	0.0707
1976-04-01	0.3906
1976-07-01	0.1898
1976-10-01	0.1132
1977-01-01	0.2617
1977-04-01	0.2101
1977-07-01	0.3202
1977-10-01	0.1179
1978-01-01	0.1303
1978-04-01	0.2043
1978-07-01	0.3343
1978-10-01	0.1151
1979-01-01	0.7756
1979-04-01	0.2396
1979-07-01	-0.2035
1979-10-01	-0.0618
1980-01-01	0.1522
1980-04-01	0.8147
1980-07-01	0.7342
1980-10-01	0.9215
1981-01-01	0.3697
1981-04-01	0.4097
1981-07-01	0.3354
1981-10-01	0.9348
1982-01-01	0.1337
1982-04-01	0.4102
1982-07-01	0.2405
1982-10-01	1.6030
1983-01-01	1.5268
1983-04-01	1.1197
1983-07-01	0.5774
1983-10-01	2.1420
1984-01-01	2.4856
1984-04-01	1.5601
1984-07-01	1.6194
1984-10-01	1.3657
1985-01-01	0.8828
1985-04-01	1.0311
1985-07-01	0.4187
1985-10-01	-0.3661
1986-01-01	1.0694
1986-04-01	1.7902
1986-07-01	1.9810
1986-10-01	1.4695
1987-01-01	2.7599
1987-04-01	2.5737
1987-07-01	0.8945
1987-10-01	-0.4526
1988-01-01	1.9505
1988-04-01	2.9872
1988-07-01	2.0418
1988-10-01	3.8283
1989-01-01	1.8281
1989-04-01	3.1936
1989-07-01	0.6797
1989-10-01	1.7933
1990-01-01	3.9034
1990-04-01	0.3736
1990-07-01	1.2617
1990-10-01	1.7079
1991-01-01	3.5304
1991-04-01	1.4337
1991-07-01	2.0646
1991-10-01	2.0987
1992-01-01	2.8171
1992-04-01	1.8444
1992-07-01	1.2318
1992-10-01	2.6110
1993-01-01	3.8530
1993-04-01	3.7767
1993-07-01	6.3539
1993-10-01	6.2056
1994-01-01	5.6663
1994-04-01	2.8200
1994-07-01	6.9194
1994-10-01	6.2943
1995-01-01	6.2747
1995-04-01	8.4961
1995-07-01	5.0151
1995-10-01	6.7919
1996-01-01	12.4245
1996-04-01	10.2496
1996-07-01	7.1850
1996-10-01	7.0990
1997-01-01	12.2532
1997-04-01	6.9690
1997-07-01	11.3605
1997-10-01	6.6235
1998-01-01	13.6326
1998-04-01	16.6394
1998-07-01	13.3408
1998-10-01	4.3579
1999-01-01	20.2661
1999-04-01	39.1857
1999-07-01	27.0065
1999-10-01	14.6499
2000-01-01	12.9914
2000-04-01	14.4778
2000-07-01	32.7341
2000-10-01	25.0978
2001-01-01	22.8934
2001-04-01	23.6615
2001-07-01	14.3657
2001-10-01	27.0810
2002-01-01	21.0782
2002-04-01	18.9130
2002-07-01	22.6770
2002-10-01	13.2114
2003-01-01	24.4768
2003-04-01	36.8800
2003-07-01	14.7342
2003-10-01	35.2093
2004-01-01	2.5496
2004-04-01	16.7142
2004-07-01	4.4157
2004-10-01	26.0132
2005-01-01	21.1510
2005-04-01	22.2916
2005-07-01	8.0521
2005-10-01	41.7841
2006-01-01	28.9280
2006-04-01	47.9117
2006-07-01	38.7844
2006-10-01	64.5180
2007-01-01	61.5955
2007-04-01	50.4594
2007-07-01	12.7188
2007-10-01	28.0777
2008-01-01	5.4020
2008-04-01	71.4166
2008-07-01	2.6084
2008-10-01	23.0998
2009-01-01	82.2768
2009-04-01	72.3663
2009-07-01	18.3794
2009-10-01	20.8612
2010-01-01	59.9285
2010-04-01	-17.4787
2010-07-01	50.8215
2010-10-01	14.5685
2011-01-01	14.5401
2011-04-01	20.6401
2011-07-01	7.8206
2011-10-01	45.3241
2012-01-01	31.8250
2012-04-01	0.3042
2012-07-01	41.1347
2012-10-01	21.3075
2013-01-01	3.8236
2013-04-01	27.4757
2013-07-01	28.1441
2013-10-01	1.9374
2014-01-01	3.1811
2014-04-01	-1.4213
2014-07-01	-0.7245
2014-10-01	5.2630
2015-01-01	-5.8034
2015-04-01	25.2800