Quarter	Billions of US Dollars
1967-04-01	0.0250
1968-04-01	0.0300
1968-10-01	0.0200
1971-01-01	0.0556
1971-04-01	0.0700
1972-10-01	0.0900
1973-01-01	0.0219
1974-04-01	0.0500
1974-10-01	0.0321
1975-01-01	0.0342
1975-04-01	0.0268
1975-10-01	0.0189
1976-01-01	0.0600
1976-04-01	0.1400
1976-10-01	0.0250
1977-01-01	0.0876
1977-04-01	0.1970
1977-10-01	0.1196
1978-01-01	-0.0049
1978-04-01	0.0932
1978-07-01	0.0077
1978-10-01	0.0260
1979-01-01	0.2658
1979-04-01	0.2591
1979-07-01	0.1000
1979-10-01	0.0179
1980-01-01	0.2500
1980-04-01	0.3476
1980-07-01	0.2907
1980-10-01	0.1148
1981-01-01	0.1900
1981-04-01	-0.0866
1981-10-01	0.4827
1982-01-01	0.8670
1982-04-01	0.1832
1982-07-01	0.1750
1982-10-01	0.6053
1983-01-01	0.2200
1983-04-01	0.2384
1983-07-01	0.1548
1983-10-01	1.1117
1984-01-01	0.6093
1984-04-01	0.1195
1984-07-01	0.8260
1984-10-01	1.6326
1985-01-01	1.0203
1985-04-01	1.6590
1985-07-01	1.1297
1985-10-01	0.7662
1986-01-01	0.2862
1986-04-01	1.5202
1986-07-01	1.3058
1986-10-01	0.6564
1987-01-01	0.2858
1987-04-01	0.6474
1987-07-01	0.2140
1987-10-01	3.6476
1988-01-01	0.8963
1988-04-01	1.5127
1988-07-01	1.3728
1988-10-01	0.2133
1989-01-01	1.2499
1989-04-01	0.6477
1989-07-01	1.1188
1989-10-01	0.7303
1990-01-01	0.3617
1990-04-01	2.6357
1990-07-01	2.7830
1990-10-01	1.2433
1991-01-01	5.7538
1991-04-01	0.0497
1991-07-01	0.6508
1991-10-01	0.3746
1992-01-01	1.6276
1992-04-01	2.8546
1992-07-01	-0.0090
1992-10-01	-0.5603
1993-01-01	2.2961
1993-04-01	1.3767
1993-07-01	8.3230
1993-10-01	1.3639
1994-01-01	3.9130
1994-04-01	0.4441
1994-07-01	4.5333
1994-10-01	5.8806
1995-01-01	0.8194
1995-04-01	6.5913
1995-07-01	4.1247
1995-10-01	-0.2904
1996-01-01	1.3879
1996-04-01	5.4840
1996-07-01	3.7884
1996-10-01	4.5794
1997-01-01	5.2780
1997-04-01	6.8448
1997-07-01	4.9623
1997-10-01	1.1680
1998-01-01	3.2157
1998-04-01	9.4210
1998-07-01	-0.0138
1998-10-01	5.3117
1999-01-01	2.6779
1999-04-01	26.3820
1999-07-01	9.6693
1999-10-01	12.6928
2000-01-01	16.9674
2000-04-01	15.8402
2000-07-01	14.6753
2000-10-01	13.3782
2001-01-01	22.0303
2001-04-01	20.0916
2001-07-01	9.5205
2001-10-01	24.8158
2002-01-01	13.9435
2002-04-01	-2.1270
2002-07-01	7.6308
2002-10-01	13.5425
2003-01-01	24.5012
2003-04-01	6.8659
2003-07-01	9.0973
2003-10-01	23.6407
2004-01-01	22.1223
2004-04-01	29.9952
2004-07-01	3.3302
2004-10-01	27.0487
2005-01-01	18.4693
2005-04-01	34.7311
2005-07-01	-8.1816
2005-10-01	24.3853
2006-01-01	19.1999
2006-04-01	22.6559
2006-07-01	27.2589
2006-10-01	25.9337
2007-01-01	19.7520
2007-04-01	51.7728
2007-07-01	-2.9154
2007-10-01	12.0466
2008-01-01	20.3330
2008-04-01	36.0936
2008-07-01	-5.9990
2008-10-01	74.2944
2009-01-01	25.7873
2009-04-01	11.0769
2009-07-01	34.1201
2009-10-01	40.3047
2010-01-01	-1.0440
2010-04-01	-5.6773
2010-07-01	24.4903
2010-10-01	18.6873
2011-01-01	20.6812
2011-04-01	9.9836
2011-07-01	5.1636
2011-10-01	8.6837
2012-01-01	-33.7153
2012-04-01	-24.3971
2012-07-01	-5.2804
2012-10-01	-3.8994
2013-01-01	-19.7779
2013-04-01	1.4605
2013-07-01	17.4751
2013-10-01	16.1436
2014-01-01	-6.8482
2014-04-01	-0.9552
2014-07-01	-35.7253
2014-10-01	-1.6986
2015-01-01	3.8513
2015-04-01	-0.5363