Bi-annual	US dollars
1987-06-30	39
1987-12-31	55
1988-06-30	36
1988-12-31	54
1989-06-30	36
1989-12-31	32
1990-06-30	40
1990-12-31	35
1991-06-30	37
1991-12-31	41
1992-06-30	42
1992-12-31	42
1993-06-30	36
1993-12-31	30
1994-06-30	35
1994-12-31	36
1995-06-30	35
1995-12-31	36
1996-06-30	26
1996-12-31	29
1997-06-30	22
1997-12-31	31
1998-06-30	55
1998-12-31	47
1999-06-30	63