Quarter	Billions of US Dollars
1973-10-01	0.0025
1974-01-01	0.0027
1974-04-01	0.0027
1974-07-01	0.0027
1974-10-01	0.0031
1975-01-01	0.0032
1975-04-01	0.0032
1975-07-01	0.0029
1975-10-01	0.0031
1976-01-01	0.0032
1976-04-01	0.0032
1976-07-01	0.0033
1976-10-01	0.0033
1977-01-01	0.0031
1977-04-01	0.0033
1977-07-01	0.0036
1977-10-01	0.0040
1978-01-01	0.0043
1978-04-01	0.0043
1978-07-01	0.0052
1978-10-01	0.0049
1979-01-01	0.0047
1979-04-01	0.0048
1979-07-01	0.0051
1979-10-01	0.0051
1980-01-01	0.0044
1980-04-01	0.0349
1980-07-01	0.0348
1980-10-01	0.0345
1981-01-01	0.0342
1981-04-01	0.0539
1981-07-01	0.0541
1981-10-01	0.1911
1982-01-01	0.1889
1982-04-01	0.2182
1982-07-01	0.2168
1982-10-01	0.2179
1983-01-01	0.2165
1983-04-01	0.2162
1983-07-01	0.2170
1983-10-01	0.2162
1984-01-01	0.2163
1984-04-01	0.2164
1984-07-01	0.2342
1984-10-01	0.2713
1985-01-01	0.4213
1985-04-01	0.4225
1985-07-01	0.4601
1985-10-01	0.6402
1986-01-01	0.9758
1986-04-01	1.0104
1986-07-01	1.0469
1986-10-01	1.0789
1987-01-01	1.2841
1987-04-01	1.2734
1987-07-01	1.2743
1987-10-01	1.5324
1988-01-01	1.4999
1988-04-01	1.6179
1988-07-01	1.9182
1988-10-01	2.0227
1989-01-01	1.9345
1989-04-01	2.0930
1989-07-01	2.1475
1989-10-01	2.5040
1990-01-01	2.5495
1990-04-01	2.6214
1990-07-01	2.9407
1990-10-01	3.3000
1991-01-01	3.3948
1991-04-01	3.3900
1991-07-01	3.7507
1991-10-01	4.1721
1992-01-01	3.7800
1992-04-01	4.3422
1992-07-01	4.5669
1992-10-01	4.0726
1993-01-01	3.8517
1993-04-01	3.8084
1993-07-01	2.7343
1993-10-01	2.8781
1994-01-01	3.1839
1994-04-01	3.4078
1994-07-01	3.8061
1994-10-01	3.3511
1995-01-01	3.5937
1995-04-01	3.6676
1995-07-01	3.6585
1995-10-01	3.7322
1996-01-01	3.9985
1996-04-01	4.0192
1996-07-01	4.4531
1996-10-01	4.5141
1997-01-01	4.7088
1997-04-01	5.2125
1997-07-01	6.0600
1997-10-01	6.0832
1998-01-01	6.0616
1998-04-01	5.8951
1998-07-01	5.7346
1998-10-01	5.8443
1999-01-01	5.8426
1999-04-01	5.4260
1999-07-01	5.2941
1999-10-01	4.9036
2000-01-01	4.5679
2000-04-01	4.4487
2000-07-01	4.4321
2000-10-01	4.4294
2001-01-01	4.2195
2001-04-01	4.1038
2001-07-01	3.9735
2001-10-01	3.9668
2002-01-01	3.8124
2002-04-01	3.9425
2002-07-01	3.5531
2002-10-01	3.4917
2003-01-01	3.2721
2003-04-01	3.2770
2003-07-01	3.3824
2003-10-01	3.4890
2004-01-01	4.2898
2004-04-01	4.7886
2004-07-01	5.0599
2004-10-01	5.9230
2005-01-01	6.6646
2005-04-01	7.1516
2005-07-01	8.3425
2005-10-01	9.0005
2006-01-01	11.7476
2006-04-01	14.0434
2006-07-01	14.8107
2006-10-01	16.2007
2007-01-01	20.9448
2007-04-01	23.0165
2007-07-01	24.7708
2007-10-01	27.8466
2008-01-01	28.4635
2008-04-01	28.5029
2008-07-01	28.3211
2008-10-01	29.1638
2009-01-01	28.2733
2009-04-01	27.5949
2009-07-01	28.3262
2009-10-01	30.4744
2010-01-01	30.1510
2010-04-01	30.0085
2010-07-01	28.9711
2010-10-01	28.4281
2011-01-01	27.5026
2011-04-01	26.3684
2011-07-01	27.6460
2011-10-01	26.0665
2012-01-01	23.0609
2012-04-01	20.8556
2012-07-01	19.4538
2012-10-01	19.4366
2013-01-01	20.5122
2013-04-01	21.7785
2013-07-01	22.8127
2013-10-01	22.7661
2014-01-01	23.4270
2014-04-01	25.3756
2014-07-01	28.3106
2014-10-01	27.7965
2015-01-01	28.6515
2015-04-01	31.2383