Bi-annual	US dollars
1987-06-30	39
1987-12-31	42
1988-06-30	24
1988-12-31	31
1989-06-30	43
1989-12-31	44
1990-06-30	49
1990-12-31	27
1991-06-30	29
1991-12-31	21
1992-06-30	13
1992-12-31	21
1993-06-30	15
1993-12-31	19
1994-06-30	15
1994-12-31	6
1995-06-30	8
1995-12-31	8
1996-06-30	9
1996-12-31	14
1997-06-30	18
1997-12-31	49
1998-06-30	47
1998-12-31	43
1999-06-30	36