Bi-annual	US dollars
1987-06-30	74
1987-12-31	70
1988-06-30	58
1988-12-31	65
1989-06-30	40
1989-12-31	37
1990-06-30	26
1990-12-31	35
1991-06-30	36
1991-12-31	37
1992-06-30	49
1992-12-31	38
1993-06-30	59
1993-12-31	40
1994-06-30	23
1994-12-31	20
1995-06-30	17
1995-12-31	26
1996-06-30	25
1996-12-31	15
1997-06-30	15
1997-12-31	28
1998-06-30	27
1998-12-31	28
1999-06-30	8