Bi-annual	US dollars
1987-06-30	35
1987-12-31	34
1988-06-30	24
1988-12-31	24
1989-06-30	16
1989-12-31	19
1990-06-30	23
1990-12-31	25
1991-06-30	16
1991-12-31	19
1992-06-30	44
1992-12-31	17
1993-06-30	17
1993-12-31	12
1994-06-30	12
1994-12-31	11
1995-06-30	8
1995-12-31	12
1996-06-30	11
1996-12-31	5
1997-06-30	5
1997-12-31	5
1998-06-30	52
1998-12-31	25
1999-06-30	16