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	0.1031
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	0.4133
1985-07-01	0.3739
1985-10-01	0.4409
1986-01-01	0.3850
1986-04-01	0.2043
1986-07-01	0.0200
1986-10-01	0.1250
1987-04-01	0.0528
1987-07-01	0.2050
1987-10-01	0.0500
1988-04-01	0.0500
1988-07-01	0.0300
1988-10-01	0.0300
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	1.2674
1991-07-01	0.2760
1991-10-01	0.4903
1992-01-01	0.7053
1992-04-01	0.5895
1992-07-01	0.7355
1992-10-01	0.7530
1993-01-01	0.6212
1993-04-01	1.2200
1993-07-01	0.7908
1993-10-01	3.0665
1994-01-01	1.2193
1994-04-01	1.1527
1994-07-01	2.0341
1994-10-01	0.2892
1995-01-01	2.2077
1995-04-01	2.0676
1995-07-01	1.5808
1995-10-01	2.0952
1996-01-01	3.0316
1996-04-01	4.6992
1996-07-01	3.6180
1996-10-01	4.7009
1997-01-01	3.5868
1997-04-01	3.3174
1997-07-01	5.7866
1997-10-01	1.7821
1998-01-01	0.3000
1998-04-01	4.2750
1998-07-01	0.1591
1998-10-01	0.5497
1999-01-01	0.5107
1999-04-01	1.5990
1999-07-01	1.5315
1999-10-01	1.9102
2000-01-01	3.2715
2000-04-01	1.3791
2000-07-01	1.9229
2000-10-01	1.0934
2001-01-01	0.9149
2001-04-01	1.0224
2001-07-01	1.5382
2001-10-01	4.8095
2002-01-01	0.7124
2002-04-01	2.6825
2002-07-01	3.2463
2002-10-01	10.2143
2003-01-01	4.9115
2003-04-01	7.6356
2003-07-01	3.3951
2003-10-01	2.0547
2004-01-01	5.3161
2004-04-01	5.1848
2004-07-01	3.4492
2004-10-01	4.3297
2005-01-01	3.0871
2005-04-01	3.5778
2005-07-01	3.4136
2005-10-01	6.5626
2006-01-01	3.7201
2006-04-01	5.5762
2006-07-01	5.4676
2006-10-01	6.3327
2007-01-01	4.2926
2007-04-01	10.3501
2007-07-01	2.0848
2007-10-01	7.1931
2008-01-01	3.0595
2008-04-01	8.7090
2008-07-01	1.7624
2008-10-01	1.6348
2009-01-01	6.1001
2009-04-01	12.2407
2009-07-01	8.7190
2009-10-01	3.4734
2010-01-01	4.6824
2010-04-01	6.5723
2010-07-01	9.1296
2010-10-01	6.9893
2011-01-01	8.2774
2011-04-01	10.5097
2011-07-01	7.9251
2011-10-01	8.8739
2012-01-01	12.8758
2012-04-01	10.2693
2012-07-01	11.4922
2012-10-01	6.2148
2013-01-01	7.5183
2013-04-01	7.7720
2013-07-01	17.6190
2013-10-01	9.6312
2014-01-01	11.1048
2014-04-01	11.5926
2014-07-01	8.2508
2014-10-01	9.0504
2015-01-01	7.9807
2015-04-01	8.2754