Quarter	Billions of US Dollars
1972-07-01	0.02500
1973-04-01	0.02000
1974-04-01	0.06130
1975-04-01	0.03500
1976-04-01	0.10930
1976-10-01	0.03770
1977-04-01	0.06750
1977-07-01	0.06030
1977-10-01	0.08800
1978-01-01	0.13970
1978-04-01	0.23310
1978-07-01	0.05070
1978-10-01	0.29230
1979-01-01	0.07380
1979-04-01	0.11900
1979-07-01	0.02500
1981-04-01	-0.05000
1982-04-01	-0.02500
1982-07-01	-0.03000
1982-10-01	-0.02057
1983-01-01	-0.04153
1983-04-01	-0.03429
1983-07-01	-0.02328
1983-10-01	-0.08368
1984-07-01	-0.02500
1985-01-01	-0.03071
1985-04-01	0.46500
1985-10-01	-0.16929
1986-04-01	-0.01431
1986-07-01	0.08637
1986-10-01	-0.04096
1987-04-01	-0.04000
1987-07-01	-0.04564
1987-10-01	-0.02141
1988-01-01	0.12420
1988-04-01	0.07557
1988-07-01	0.10712
1988-10-01	-0.03220
1989-01-01	-0.04159
1989-04-01	0.05340
1989-07-01	0.03440
1990-01-01	-0.01750
1990-04-01	-0.11960
1990-07-01	-0.01750
1990-10-01	-0.03425
1991-01-01	-0.05250
1991-07-01	-0.01750
1992-04-01	-0.01750
1992-07-01	-0.13669
1992-10-01	-0.05000
1993-01-01	-0.06611
1993-04-01	-0.50000
1993-07-01	-0.08941
1994-01-01	-0.08700
1994-04-01	-0.09027
1994-07-01	-0.09602
1995-04-01	-0.18950
1995-07-01	-0.09247
1995-10-01	-0.09856
2012-10-01	0.27500
2013-10-01	0.05000
2014-04-01	0.50043