Quarter	Millions of US Dollars
1973-04-01	21
1973-07-01	21
1973-10-01	36
1974-01-01	54
1974-04-01	54
1974-07-01	53
1974-10-01	57
1975-01-01	83
1975-04-01	83
1975-07-01	79
1975-10-01	80
1976-01-01	81
1976-04-01	81
1976-07-01	83
1976-10-01	84
1977-01-01	109
1977-04-01	110
1977-07-01	112
1977-10-01	120
1978-01-01	124
1978-04-01	126
1978-07-01	135
1978-10-01	134
1979-01-01	130
1979-04-01	130
1979-07-01	133
1979-10-01	131
1980-01-01	123
1980-04-01	132
1980-07-01	132
1980-10-01	128
1981-01-01	124
1981-04-01	118
1981-07-01	118
1981-10-01	123
1982-01-01	117
1982-04-01	114
1982-07-01	111
1982-10-01	117
1983-01-01	91
1983-04-01	89
1983-07-01	89
1983-10-01	88
1984-01-01	65
1984-04-01	61
1984-07-01	77
1984-10-01	75
1985-01-01	75
1985-04-01	96
1985-07-01	111
1985-10-01	69
1986-01-01	76
1986-04-01	82
1986-07-01	88
1986-10-01	86
1987-01-01	94
1987-04-01	87
1987-07-01	87
1987-10-01	104
1988-01-01	101
1988-04-01	78
1988-07-01	74
1988-10-01	80
1989-01-01	75
1989-04-01	70
1989-07-01	72
1989-10-01	70
1990-01-01	63
1990-04-01	66
1990-07-01	72
1990-10-01	74
1991-01-01	71
1991-04-01	72
1991-07-01	38
1991-10-01	40
1992-01-01	38
1992-04-01	40
1992-07-01	42
1992-10-01	40
1993-01-01	43
1993-04-01	47
1993-07-01	47
1993-10-01	45
1994-01-01	49
1994-04-01	51
1994-07-01	51
1994-10-01	50
1995-01-01	57