Bi-annual	US dollars
1987-06-30	24
1987-12-31	17
1988-06-30	12
1988-12-31	14
1989-06-30	23
1989-12-31	29
1990-06-30	28
1990-12-31	39
1991-06-30	41
1991-12-31	43
1992-06-30	57
1992-12-31	45
1993-06-30	35
1993-12-31	33
1994-06-30	28
1994-12-31	27
1995-06-30	25
1995-12-31	23
1996-06-30	22
1996-12-31	21
1997-06-30	22
1997-12-31	72
1998-06-30	30
1998-12-31	7
1999-06-30	9