Bi-annual	US dollars
1987-06-30	37
1987-12-31	30
1988-06-30	32
1988-12-31	67
1989-06-30	45
1989-12-31	34
1990-06-30	16
1990-12-31	27
1991-06-30	18
1991-12-31	22
1992-06-30	36
1992-12-31	42
1993-06-30	72
1993-12-31	84
1994-06-30	93
1994-12-31	102
1995-06-30	102
1995-12-31	107
1996-06-30	110
1996-12-31	72
1997-06-30	110
1997-12-31	127
1998-06-30	127
1998-12-31	97
1999-06-30	150