Quarter	Billions of US Dollars
1972-10-01	0.02000
1973-01-01	0.02000
1973-04-01	0.04474
1973-07-01	0.04484
1973-10-01	0.04220
1974-01-01	0.04378
1974-04-01	0.04348
1974-07-01	0.04262
1974-10-01	0.04490
1975-01-01	0.04559
1975-04-01	0.04548
1975-07-01	0.04254
1975-10-01	0.07288
1976-01-01	0.07364
1976-04-01	0.07331
1976-07-01	0.07463
1976-10-01	0.07540
1977-01-01	0.10512
1977-04-01	0.15699
1977-07-01	0.15801
1977-10-01	0.16551
1978-01-01	0.21394
1978-04-01	0.21559
1978-07-01	0.25151
1978-10-01	0.25721
1979-01-01	0.25093
1979-04-01	0.25053
1979-07-01	0.25678
1979-10-01	0.25455
1980-01-01	0.23849
1980-04-01	0.25677
1980-07-01	0.25411
1980-10-01	0.22667
1981-01-01	0.21682
1981-04-01	0.20049
1981-07-01	0.20201
1981-10-01	0.17748
1982-01-01	0.16584
1982-04-01	0.16287
1982-07-01	0.15810
1982-10-01	0.16933
1983-01-01	0.16656
1983-04-01	0.16220
1983-07-01	0.15951
1983-10-01	0.15751
1984-01-01	0.13331
1984-04-01	0.12471
1984-07-01	0.10023
1984-10-01	0.09700
1985-01-01	0.09780
1985-04-01	0.07938
1985-07-01	0.09103
1985-10-01	0.07425
1986-01-01	0.08157
1986-04-01	0.08790
1986-07-01	0.09480
1986-10-01	0.09377
1987-01-01	0.10183
1987-04-01	0.10082
1987-07-01	0.06833
1987-10-01	0.08097
2002-07-01	0.61625
2002-10-01	1.04870
2003-01-01	1.08950
2003-04-01	1.14270
2003-07-01	1.16520
2003-10-01	1.26300
2004-01-01	1.22240
2004-04-01	1.21550
2004-07-01	1.24090
2004-10-01	1.36210
2005-01-01	1.29640
2005-04-01	1.20920
2005-07-01	1.20420
2005-10-01	1.17970
2006-01-01	1.21040
2006-04-01	1.27130
2006-07-01	1.26600
2006-10-01	1.31700
2007-01-01	1.33180
2007-04-01	1.35050
2007-07-01	0.53171
2007-10-01	0.55204
2008-01-01	0.59295