Quarter	Billions of US Dollars
1966-04-01	0.0100
1967-04-01	0.0250
1971-01-01	0.0256
1971-10-01	0.0124
1972-01-01	0.0576
1972-04-01	0.0443
1972-07-01	0.1007
1972-10-01	0.1282
1973-01-01	0.0427
1973-04-01	0.0432
1973-07-01	0.0428
1973-10-01	0.0425
1974-01-01	0.0162
1974-04-01	0.0028
1974-10-01	0.0515
1975-01-01	0.0216
1975-04-01	0.0777
1975-07-01	0.0841
1975-10-01	0.1377
1976-01-01	0.1262
1976-04-01	0.1170
1976-07-01	0.2991
1976-10-01	0.2364
1977-01-01	0.2371
1977-04-01	0.1745
1977-07-01	0.0883
1977-10-01	0.2344
1978-01-01	0.2332
1978-04-01	0.2189
1978-07-01	0.3244
1978-10-01	0.1373
1979-01-01	0.1808
1979-04-01	0.1533
1979-07-01	0.2115
1979-10-01	0.0486
1980-01-01	0.2007
1980-04-01	0.3773
1980-07-01	0.3599
1980-10-01	0.0772
1981-01-01	0.1816
1981-04-01	0.1998
1981-07-01	0.3301
1981-10-01	0.1981
1982-01-01	0.2374
1982-04-01	0.2445
1982-07-01	-0.0504
1982-10-01	0.2488
1983-01-01	0.1410
1983-04-01	0.2746
1983-07-01	0.2300
1983-10-01	0.8255
1984-01-01	1.1317
1984-04-01	0.4171
1984-07-01	1.1214
1984-10-01	0.6884
1985-01-01	0.2703
1985-04-01	0.9017
1985-07-01	-0.5880
1985-10-01	-0.0121
1986-01-01	-0.0133
1986-04-01	0.9371
1986-07-01	3.0964
1986-10-01	1.7965
1987-01-01	2.8584
1987-04-01	0.2485
1987-07-01	0.0674
1987-10-01	0.2200
1988-01-01	0.1046
1988-04-01	0.9144
1988-07-01	-0.1607
1988-10-01	-0.4991
1989-01-01	0.0693
1989-04-01	0.0407
1989-07-01	0.0192
1989-10-01	0.8106
1990-01-01	1.9307
1990-04-01	-0.6716
1990-07-01	0.7590
1990-10-01	-0.4542
1991-01-01	-1.0706
1991-04-01	-0.4189
1991-07-01	-1.0263
1991-10-01	-2.0635
1992-01-01	-2.9479
1992-04-01	-0.5286
1992-07-01	-0.2623
1992-10-01	-0.1000
1993-01-01	1.1798
1993-04-01	0.5155
1993-07-01	4.1780
1993-10-01	1.2686
1994-01-01	-0.1176
1994-04-01	-1.0790
1994-07-01	0.2882
1994-10-01	-0.2348
1995-01-01	-2.1544
1995-04-01	0.0263
1995-07-01	0.7202
1995-10-01	-0.3839
1996-01-01	0.3546
1996-04-01	-0.1108
1996-07-01	0.0025
1996-10-01	0.3939
1997-01-01	0.9567
1997-04-01	1.2488
1997-07-01	-0.1998
1997-10-01	-0.7197
1998-01-01	-1.0088
1998-04-01	-0.4650
1998-07-01	-1.0417
1998-10-01	0.0650
1999-01-01	0.1015
1999-04-01	-0.0549
1999-07-01	1.1517
1999-10-01	-0.6165
2000-01-01	-0.0551
2000-04-01	0.5813
2000-07-01	0.2872
2000-10-01	0.0607
2001-01-01	0.1439
2001-04-01	2.6588
2001-07-01	-0.3925
2001-10-01	0.0417
2002-01-01	-0.0814
2002-04-01	0.2179
2002-07-01	0.5158
2002-10-01	-0.4783
2003-01-01	2.2128
2003-04-01	3.0607
2003-07-01	1.1932
2003-10-01	-0.3333
2004-01-01	0.8152
2004-04-01	1.6887
2004-07-01	-0.0726
2004-10-01	1.8439
2005-01-01	8.2485
2005-04-01	4.8081
2005-07-01	2.8775
2005-10-01	4.1078
2006-01-01	2.9202
2006-04-01	3.7321
2006-07-01	2.6697
2006-10-01	2.9009
2007-01-01	9.7786
2007-04-01	20.3618
2007-07-01	-2.6172
2007-10-01	1.8651
2008-01-01	1.1151
2008-04-01	7.6260
2008-07-01	5.3684
2008-10-01	-3.7175
2009-01-01	11.3569
2009-04-01	12.2189
2009-07-01	4.6728
2009-10-01	4.1231
2010-01-01	1.3466
2010-04-01	2.2170
2010-07-01	-7.1579
2010-10-01	1.0106
2011-01-01	11.6811
2011-04-01	1.3610
2011-07-01	4.3279
2011-10-01	-7.4783
2012-01-01	3.3756
2012-04-01	-7.0895
2012-07-01	6.1919
2012-10-01	5.1834
2013-01-01	-3.4269
2013-04-01	-2.5184
2013-07-01	-2.8954
2013-10-01	1.7087
2014-01-01	-2.6440
2014-04-01	-2.3927
2014-07-01	0.7866
2014-10-01	1.7562
2015-01-01	6.0495
2015-04-01	-2.2403