Bi-annual	US dollars
1987-06-30	34
1987-12-31	38
1988-06-30	32
1988-12-31	31
1989-06-30	25
1989-12-31	27
1990-06-30	30
1990-12-31	33
1991-06-30	26
1991-12-31	30
1992-06-30	30
1992-12-31	29
1993-06-30	27
1993-12-31	28
1994-06-30	31
1994-12-31	31
1995-06-30	37
1995-12-31	36
1996-06-30	33
1996-12-31	15
1997-06-30	28
1997-12-31	28
1998-06-30	27
1998-12-31	30
1999-06-30	27