Bi-annual	US dollars
1987-06-30	8
1987-12-31	19
1988-06-30	15
1988-12-31	33
1989-06-30	48
1989-12-31	47
1990-06-30	54
1990-12-31	29
1991-06-30	29
1991-12-31	35
1992-06-30	27
1992-12-31	36
1993-06-30	54
1993-12-31	78
1994-06-30	23
1994-12-31	28
1995-06-30	51
1995-12-31	40
1996-06-30	62
1996-12-31	86
1997-06-30	42
1997-12-31	84
1998-06-30	45
1998-12-31	2
1999-06-30	2