Bi-annual	US dollars
1987-06-30	35
1987-12-31	42
1988-06-30	36
1988-12-31	36
1989-06-30	29
1989-12-31	35
1990-06-30	37
1990-12-31	37
1991-06-30	29
1991-12-31	35
1992-06-30	34
1992-12-31	33
1993-06-30	32
1993-12-31	31
1994-06-30	35
1994-12-31	36
1995-06-30	38
1995-12-31	37
1996-06-30	34
1996-12-31	34
1997-06-30	33
1997-12-31	31
1998-06-30	32
1998-12-31	33
1999-06-30	28