Bi-annual	US dollars
1987-06-30	27
1987-12-31	21
1988-06-30	29
1988-12-31	27
1989-06-30	12
1989-12-31	18
1990-06-30	45
1990-12-31	58
1991-06-30	54
1991-12-31	34
1992-06-30	17
1992-12-31	14
1993-06-30	15
1993-12-31	24
1994-06-30	17
1994-12-31	27
1995-06-30	41
1995-12-31	36
1996-06-30	132
1996-12-31	113
1997-06-30	98
1997-12-31	23
1998-06-30	27
1998-12-31	8
1999-06-30	13