Quarter	Billions of US Dollars
1974-10-01	0.00984
1975-01-01	0.00989
1975-04-01	0.00998
1975-07-01	0.00910
1975-10-01	0.02863
1976-01-01	0.02960
1976-04-01	0.03033
1976-07-01	0.03056
1976-10-01	0.03062
1977-01-01	0.02951
1977-04-01	0.03047
1977-07-01	0.03360
1977-10-01	0.03750
1978-01-01	0.04014
1978-04-01	0.05381
1978-07-01	0.06481
1978-10-01	0.06173
1979-01-01	0.05914
1979-04-01	0.06020
1979-07-01	0.06423
1979-10-01	0.08544
1980-01-01	0.07369
1980-04-01	0.08341
1980-07-01	0.08174
1980-10-01	0.07655
1981-01-01	0.08617
1981-04-01	0.08124
1981-07-01	0.08369
1981-10-01	0.09174
1982-01-01	0.08531
1982-04-01	0.09508
1982-07-01	0.09226
1982-10-01	0.10028
1983-01-01	0.15852
1983-04-01	0.15681
1983-07-01	0.15495
1983-10-01	0.15141
1984-01-01	0.15326
1984-04-01	0.17166
1984-07-01	0.16013
1984-10-01	0.15474
1985-01-01	0.15282
1985-04-01	0.15616
1985-07-01	0.18340
1985-10-01	0.24079
1986-01-01	0.24231
1986-04-01	0.26172
1986-07-01	0.28690
1986-10-01	0.28950
1987-01-01	0.37849
1987-04-01	0.35197
1987-07-01	0.34990
1987-10-01	0.46557
1988-01-01	0.43478
1988-04-01	0.52401
1988-07-01	0.52595
1988-10-01	0.58577
1989-01-01	0.53373
1989-04-01	0.48775
1989-07-01	0.53523
1989-10-01	0.54381
1990-01-01	0.56198
1990-04-01	0.58907
1990-07-01	0.64280
1990-10-01	0.56735
1991-01-01	0.50342
1991-04-01	0.50192
1991-07-01	0.54019
1991-10-01	0.50756
1992-01-01	0.45913
1992-04-01	0.49824
1992-07-01	0.55822
1992-10-01	0.43704
1993-01-01	0.42564
1993-04-01	0.48029
1993-07-01	0.67513
1993-10-01	0.71443
1994-01-01	0.80638
1994-04-01	0.84567
1994-07-01	0.88414
1994-10-01	0.82882
1995-01-01	0.95426
1995-04-01	1.03128
1995-07-01	1.12520
1995-10-01	1.07953
1996-01-01	1.01412
1996-04-01	1.04187
1996-07-01	0.81803
1996-10-01	0.77563
1997-01-01	0.65341
1997-04-01	0.65213
1997-07-01	0.65229
1997-10-01	0.58430
1998-01-01	0.56392
1998-04-01	0.50984
1998-07-01	0.55331
1998-10-01	0.55539
1999-01-01	0.51764
1999-04-01	0.59404
1999-07-01	0.61655
1999-10-01	0.61220
2000-01-01	0.52918
2000-04-01	0.53678
2000-07-01	0.50556
2000-10-01	0.68567
2001-01-01	0.64874
2001-04-01	0.54364
2001-07-01	0.75602
2001-10-01	0.72834
2002-01-01	0.89581
2002-04-01	1.03424
2002-07-01	0.96590
2002-10-01	1.05880
2003-01-01	1.02199
2003-04-01	0.96284
2003-07-01	1.14117
2003-10-01	1.21030
2004-01-01	1.27147
2004-04-01	1.28767
2004-07-01	1.28370
2004-10-01	1.55325
2005-01-01	1.48006
2005-04-01	1.57811
2005-07-01	1.57377
2005-10-01	1.35651
2006-01-01	1.56060
2006-04-01	1.66368
2006-07-01	1.64252
2006-10-01	1.59385
2007-01-01	1.59614
2007-04-01	1.79686
2007-07-01	1.88333
2007-10-01	1.76997
2008-01-01	1.98986
2008-04-01	2.28250
2008-07-01	1.92135
2008-10-01	1.97949
2009-01-01	1.74525
2009-04-01	2.09877
2009-07-01	2.16669
2009-10-01	2.55172
2010-01-01	2.48050
2010-04-01	2.61748
2010-07-01	2.89825
2010-10-01	3.00128
2011-01-01	2.86401
2011-04-01	3.05609
2011-07-01	2.82893
2011-10-01	2.71017
2012-01-01	2.82361
2012-04-01	1.83169
2012-07-01	2.13789
2012-10-01	2.18198
2013-01-01	2.41571
2013-04-01	2.44369
2013-07-01	2.26469
2013-10-01	2.52384
2014-01-01	2.26244
2014-04-01	1.90947
2014-07-01	1.77435
2014-10-01	1.71873
2015-01-01	1.74753
2015-04-01	2.04169