Bi-annual	US dollars
1987-06-30	23
1987-12-31	25
1988-06-30	24
1988-12-31	22
1989-06-30	23
1989-12-31	44
1990-06-30	30
1990-12-31	25
1991-06-30	23
1991-12-31	21
1992-06-30	25
1992-12-31	18
1993-06-30	18
1993-12-31	27
1994-06-30	22
1994-12-31	20
1995-06-30	16
1995-12-31	11
1996-06-30	6
1996-12-31	7
1997-06-30	7
1997-12-31	7
1998-06-30	7
1998-12-31	7
1999-06-30	6