Bi-annual	US dollars
1987-06-30	60
1987-12-31	58
1988-06-30	60
1988-12-31	61
1989-06-30	29
1989-12-31	29
1990-06-30	30
1990-12-31	29
1991-06-30	29
1991-12-31	28
1992-06-30	30
1992-12-31	29
1993-06-30	29
1993-12-31	30
1994-06-30	29
1994-12-31	28
1995-06-30	29
1995-12-31	6
1996-06-30	6
1996-12-31	21
1997-06-30	25
1997-12-31	25
1998-06-30	30
1998-12-31	22
1999-06-30	20