Bi-annual	US dollars
1987-06-30	61
1987-12-31	64
1988-06-30	70
1988-12-31	60
1989-06-30	33
1989-12-31	47
1990-06-30	37
1990-12-31	33
1991-06-30	26
1991-12-31	30
1992-06-30	17
1992-12-31	15
1993-06-30	18
1993-12-31	18
1994-06-30	14
1994-12-31	33
1995-06-30	30
1995-12-31	36
1996-06-30	51
1996-12-31	74
1997-06-30	62
1997-12-31	38
1998-06-30	55
1998-12-31	67
1999-06-30	57