Quarter	Billions of US Dollars
1971-10-01	0.0306
1972-01-01	0.0815
1972-04-01	0.0400
1972-07-01	0.0513
1972-10-01	0.1448
1973-01-01	0.0953
1973-04-01	0.0250
1973-07-01	0.0757
1973-10-01	0.1092
1974-01-01	0.0050
1974-07-01	0.0019
1974-10-01	0.0750
1975-01-01	0.1675
1975-04-01	0.1466
1975-07-01	0.0490
1975-10-01	0.0618
1976-01-01	0.0617
1976-04-01	0.1931
1976-07-01	0.1307
1976-10-01	0.2724
1977-01-01	0.3189
1977-04-01	0.6124
1977-07-01	0.8820
1977-10-01	0.9382
1978-01-01	1.1764
1978-04-01	0.6848
1978-07-01	0.3959
1978-10-01	0.6101
1979-01-01	0.5744
1979-04-01	0.2639
1979-07-01	0.4834
1979-10-01	0.2886
1980-01-01	-0.0468
1980-04-01	0.5910
1980-07-01	0.3128
1980-10-01	0.2621
1981-01-01	0.1697
1981-04-01	0.7805
1981-07-01	0.4343
1981-10-01	0.8702
1982-01-01	0.6130
1982-04-01	-0.0786
1982-07-01	-0.0088
1982-10-01	-0.0934
1983-01-01	-0.4325
1983-04-01	-0.1530
1983-07-01	-0.0421
1983-10-01	-0.2348
1984-01-01	-0.1444
1984-04-01	-0.1535
1984-07-01	-0.3384
1984-10-01	-0.0723
1985-01-01	-0.1237
1985-04-01	-0.1091
1985-07-01	-0.1478
1985-10-01	-1.0120
1986-01-01	-0.2515
1986-04-01	-0.4760
1986-07-01	-0.1575
1986-10-01	-0.6688
1987-01-01	-0.5120
1987-04-01	-0.2840
1987-07-01	-0.3279
1987-10-01	-0.5561
1988-01-01	-0.1407
1988-04-01	-0.7586
1988-07-01	-0.8277
1988-10-01	-0.2347
1989-01-01	-0.1392
1989-04-01	-0.1220
1989-07-01	0.7277
1989-10-01	-0.4171
1990-01-01	35.2498
1990-04-01	0.6975
1990-07-01	0.5516
1990-10-01	16.1721
1991-01-01	1.5221
1991-04-01	1.0415
1991-07-01	1.1144
1991-10-01	2.7109
1992-01-01	1.3709
1992-04-01	2.0962
1992-07-01	1.2837
1992-10-01	2.5510
1993-01-01	1.0110
1993-04-01	22.2017
1993-07-01	2.1693
1993-10-01	16.1472
1994-01-01	6.4030
1994-04-01	43.7789
1994-07-01	2.7262
1994-10-01	3.7411
1995-01-01	4.1153
1995-04-01	3.2605
1995-07-01	5.3867
1995-10-01	4.7034
1996-01-01	7.0400
1996-04-01	7.4076
1996-07-01	12.3029
1996-10-01	9.9900
1997-01-01	15.8697
1997-04-01	14.8213
1997-07-01	10.5700
1997-10-01	-0.2993
1998-01-01	6.7585
1998-04-01	12.6746
1998-07-01	4.0494
1998-10-01	-21.4618
1999-01-01	1.1735
1999-04-01	12.1511
1999-07-01	3.7634
1999-10-01	7.0846
2000-01-01	13.4461
2000-04-01	0.0467
2000-07-01	14.4098
2000-10-01	-3.4939
2001-01-01	10.6679
2001-04-01	-4.8680
2001-07-01	0.8919
2001-10-01	-4.8326
2002-01-01	1.9263
2002-04-01	-4.8487
2002-07-01	-1.7832
2002-10-01	-0.3906
2003-01-01	-7.5292
2003-04-01	-2.6144
2003-07-01	-1.7872
2003-10-01	3.9837
2004-01-01	4.4029
2004-04-01	-5.5941
2004-07-01	-1.0055
2004-10-01	3.4380
2005-01-01	5.7312
2005-04-01	-28.6844
2005-07-01	1.3639
2005-10-01	5.8382
2006-01-01	2.4120
2006-04-01	-17.4613
2006-07-01	5.3027
2006-10-01	6.4461
2007-01-01	2.6361
2007-04-01	14.1110
2007-07-01	0.4906
2007-10-01	2.5529
2008-01-01	-4.8156
2008-04-01	-0.0826
2008-07-01	-4.0246
2008-10-01	-10.1255
2009-01-01	1.1497
2009-04-01	-0.2023
2009-07-01	11.9851
2009-10-01	26.0643
2010-01-01	11.3594
2010-04-01	16.1193
2010-07-01	17.1689
2010-10-01	16.8306
2011-01-01	17.8635
2011-04-01	16.5451
2011-07-01	11.9166
2011-10-01	20.8971
2012-01-01	14.1477
2012-04-01	8.6516
2012-07-01	19.6799
2012-10-01	16.2972
2013-01-01	11.5697
2013-04-01	16.7395
2013-07-01	18.5027
2013-10-01	24.8709
2014-01-01	11.6565
2014-04-01	26.4572
2014-07-01	26.2291
2014-10-01	7.6478
2015-01-01	12.1348
2015-04-01	18.6549