Quarter	Billions of US Dollars
1987-01-01	0.01248
1987-04-01	0.01237
1987-07-01	0.01230
1987-10-01	0.01471
1988-01-01	0.01374
1988-04-01	0.01245
1988-07-01	0.01183
1988-10-01	0.01250
1989-01-01	0.01133
1989-04-01	0.01124
1989-07-01	0.01162
1989-10-01	0.01216
1990-01-01	0.01256
1990-04-01	0.57825
1990-07-01	0.57946
1990-10-01	0.56499
1991-01-01	0.56499
1991-04-01	0.56499
1991-07-01	0.56499
1991-10-01	0.56499
1992-01-01	0.56499
1992-04-01	0.56499
1992-07-01	0.56499
1992-10-01	0.56499
1993-01-01	0.56499
1993-04-01	0.56499
1993-07-01	0.56499
1993-10-01	0.56499
1994-01-01	0.56499
1994-04-01	0.56499
1994-07-01	0.56499
1994-10-01	0.56499
1995-01-01	0.56499
1995-04-01	0.56499
1995-07-01	0.56499
1995-10-01	0.56499
1996-01-01	0.56499
1996-04-01	0.56499
1996-07-01	0.56499
1996-10-01	0.49838
1997-01-01	0.49838
1997-04-01	0.49838
1997-07-01	0.52141
1997-10-01	0.52389
1998-01-01	0.51302
1998-04-01	0.50907
1998-07-01	0.50819
1998-10-01	0.44085
1999-01-01	0.44175
1999-04-01	0.44675
1999-07-01	0.44677
1999-10-01	0.44677
2000-01-01	0.44927
2000-04-01	0.44201
2000-07-01	0.44244
2000-10-01	0.43205
2001-01-01	0.43215
2001-04-01	0.41126
2001-07-01	0.40116
2001-10-01	0.39077
2002-01-01	0.39077
2002-04-01	0.38038
2002-07-01	0.38038
2002-10-01	0.36998
2003-01-01	0.36998
2003-04-01	0.21411
2003-07-01	0.21411
2003-10-01	0.21411
2014-01-01	0.35000
2014-04-01	0.35000
2014-07-01	0.35000
2014-10-01	0.35000
2015-01-01	0.35000
2015-04-01	0.35000