Bi-annual	US dollars
1987-06-30	35
1987-12-31	42
1988-06-30	119
1988-12-31	49
1989-06-30	51
1989-12-31	37
1990-06-30	54
1990-12-31	42
1991-06-30	47
1991-12-31	41
1992-06-30	116
1992-12-31	100
1993-06-30	110
1993-12-31	90
1994-06-30	102
1994-12-31	41
1995-06-30	25
1995-12-31	43
1996-06-30	37
1996-12-31	31
1997-06-30	7
1997-12-31	31
1998-06-30	42
1998-12-31	72
1999-06-30	27