Bi-annual	US dollars
1987-06-30	24
1987-12-31	25
1988-06-30	31
1988-12-31	33
1989-06-30	28
1989-12-31	27
1990-06-30	21
1990-12-31	23
1991-06-30	21
1991-12-31	21
1992-06-30	27
1992-12-31	35
1993-06-30	23
1993-12-31	4
1994-06-30	5
1994-12-31	3
1995-06-30	3
1995-12-31	6
1996-06-30	28
1996-12-31	31
1997-06-30	7
1997-12-31	13
1998-06-30	15
1998-12-31	12
1999-06-30	13