Bi-annual	US dollars
1987-06-30	8
1987-12-31	2
1988-06-30	17
1988-12-31	13
1989-06-30	14
1989-12-31	16
1990-06-30	2
1990-12-31	12
1991-06-30	19
1991-12-31	26
1992-06-30	23
1992-12-31	12
1993-06-30	47
1993-12-31	7
1994-06-30	8
1994-12-31	9
1995-06-30	6
1995-12-31	6
1996-06-30	14
1996-12-31	14
1997-06-30	13
1997-12-31	12
1998-06-30	37
1998-12-31	23
1999-06-30	35