Quarter	Billions of US Dollars
1973-04-01	0.02062
1973-07-01	0.02070
1973-10-01	0.03636
1974-01-01	0.05460
1974-04-01	0.05385
1974-07-01	0.05257
1974-10-01	0.05705
1975-01-01	0.08312
1975-04-01	0.08306
1975-07-01	0.07850
1975-10-01	0.07954
1976-01-01	0.08111
1976-04-01	0.08145
1976-07-01	0.08329
1976-10-01	0.08365
1977-01-01	0.10862
1977-04-01	0.11038
1977-07-01	0.11291
1977-10-01	0.11959
1978-01-01	0.12396
1978-04-01	0.12543
1978-07-01	0.13463
1978-10-01	0.13391
1979-01-01	0.13023
1979-04-01	0.13019
1979-07-01	0.13320
1979-10-01	0.13138
1980-01-01	0.12306
1980-04-01	0.13231
1980-07-01	0.13144
1980-10-01	0.12851
1981-01-01	0.12360
1981-04-01	0.11767
1981-07-01	0.11838
1981-10-01	0.12271
1982-01-01	0.11685
1982-04-01	0.11378
1982-07-01	0.11140
1982-10-01	0.11738
1983-01-01	0.09051
1983-04-01	0.08929
1983-07-01	0.08860
1983-10-01	0.08783
1984-01-01	0.06478
1984-04-01	0.06047
1984-07-01	0.07728
1984-10-01	0.07505
1985-01-01	0.07487
1985-04-01	0.09611
1985-07-01	0.11078
1985-10-01	0.06854
1986-01-01	0.07560
1986-04-01	0.08193
1986-07-01	0.08841
1986-10-01	0.08665
1987-01-01	0.09422
1987-04-01	0.08655
1987-07-01	0.08675
1987-10-01	0.10291
1988-01-01	0.10030
1988-04-01	0.07827
1988-07-01	0.07432
1988-10-01	0.07946
1989-01-01	0.07573
1989-04-01	0.06940
1989-07-01	0.07179
1989-10-01	0.06971
1990-01-01	0.06361
1990-04-01	0.06540
1990-07-01	0.07257
1990-10-01	0.07440
1991-01-01	0.07092
1991-04-01	0.07252
1991-07-01	0.03764
1991-10-01	0.03994
1992-01-01	0.03754
1992-04-01	0.03984
1992-07-01	0.04195
1992-10-01	0.04008
1993-01-01	0.04297
1993-04-01	0.04684
1993-07-01	0.04755
1993-10-01	0.04470
1994-01-01	0.04847
1994-04-01	0.05048
1994-07-01	0.05079
1994-10-01	0.05013
1995-01-01	0.05596