Bi-annual	US dollars
1987-06-30	19
1987-12-31	26
1988-06-30	5
1988-12-31	14
1989-06-30	9
1989-12-31	21
1990-06-30	19
1990-12-31	17
1991-06-30	16
1991-12-31	15
1992-06-30	53
1992-12-31	26
1993-06-30	23
1993-12-31	27
1994-06-30	15
1994-12-31	27
1995-06-30	37
1995-12-31	40
1996-06-30	42
1996-12-31	92
1997-06-30	42
1997-12-31	44
1998-06-30	38
1998-12-31	38
1999-06-30	22