Quarter	Billions of US Dollars
1974-10-01	0.0189
1976-04-01	0.0100
1976-07-01	0.0241
1976-10-01	0.0401
1977-01-01	0.0250
1977-10-01	0.0465
1978-01-01	0.0415
1978-04-01	0.0145
1979-01-01	0.0436
1980-10-01	0.0473
1981-07-01	0.0731
1982-01-01	0.0406
1983-04-01	0.0208
1983-07-01	0.0702
1983-10-01	0.0716
1984-01-01	0.0435
1984-04-01	0.1148
1984-07-01	0.1899
1984-10-01	0.3950
1985-01-01	0.2000
1985-04-01	0.3633
1985-07-01	0.3739
1985-10-01	0.4409
1986-01-01	0.3350
1986-04-01	0.2043
1986-07-01	0.0200
1986-10-01	0.1250
1987-01-01	0.0250
1987-04-01	0.0528
1987-07-01	0.2050
1987-10-01	0.0500
1988-04-01	0.0800
1988-07-01	0.0300
1988-10-01	0.0300
1989-07-01	0.0400
1989-10-01	0.2883
1990-01-01	0.2200
1990-04-01	0.3576
1990-07-01	0.1400
1990-10-01	0.7242
1991-01-01	0.6557
1991-04-01	1.3174
1991-07-01	0.2760
1991-10-01	0.4903
1992-01-01	0.7053
1992-04-01	0.5895
1992-07-01	0.8644
1992-10-01	0.8530
1993-01-01	0.7112
1993-04-01	1.2200
1993-07-01	0.7908
1993-10-01	3.1765
1994-01-01	1.2593
1994-04-01	1.2897
1994-07-01	2.0341
1994-10-01	0.2892
1995-01-01	2.1870
1995-04-01	1.9896
1995-07-01	1.6158
1995-10-01	2.0052
1996-01-01	3.0816
1996-04-01	4.8492
1996-07-01	3.5571
1996-10-01	4.8082
1997-01-01	4.0348
1997-04-01	3.4211
1997-07-01	5.9796
1997-10-01	1.8220
1998-01-01	0.3000
1998-04-01	4.6453
1998-07-01	0.1591
1998-10-01	0.8355
1999-01-01	0.6168
1999-04-01	1.6590
1999-07-01	1.5345
1999-10-01	1.9102
2000-01-01	3.1715
2000-04-01	1.6346
2000-07-01	2.5220
2000-10-01	1.4508
2001-01-01	0.6149
2001-04-01	1.0248
2001-07-01	2.4718
2001-10-01	4.0495
2002-01-01	1.0375
2002-04-01	3.0785
2002-07-01	4.9063
2002-10-01	12.1399
2003-01-01	4.6065
2003-04-01	7.3786
2003-07-01	4.3616
2003-10-01	3.2300
2004-01-01	4.7271
2004-04-01	5.7133
2004-07-01	3.5838
2004-10-01	3.8859
2005-01-01	3.5059
2005-04-01	3.9400
2005-07-01	3.9246
2005-10-01	7.7501
2006-01-01	4.0351
2006-04-01	5.6382
2006-07-01	5.9676
2006-10-01	6.6327
2007-01-01	4.6221
2007-04-01	8.8370
2007-07-01	2.2308
2007-10-01	7.3931
2008-01-01	3.4595
2008-04-01	8.8960
2008-07-01	2.8812
2008-10-01	1.6348
2009-01-01	6.1001
2009-04-01	12.6042
2009-07-01	8.7190
2009-10-01	3.7734
2010-01-01	4.6824
2010-04-01	7.0723
2010-07-01	9.6296
2010-10-01	7.7725
2011-01-01	8.2824
2011-04-01	10.9246
2011-07-01	9.2319
2011-10-01	9.1739
2012-01-01	13.3140
2012-04-01	11.4219
2012-07-01	11.4922
2012-10-01	7.7260
2013-01-01	7.5183
2013-04-01	7.7820
2013-07-01	18.6213
2013-10-01	10.0716
2014-01-01	11.1306
2014-04-01	11.6415
2014-07-01	8.4060
2014-10-01	9.7335
2015-01-01	7.6242
2015-04-01	8.7128