Bi-annual	US dollars
1987-06-30	34
1987-12-31	17
1988-06-30	9
1988-12-31	13
1989-06-30	31
1989-12-31	42
1990-06-30	26
1990-12-31	27
1991-06-30	21
1991-12-31	30
1992-06-30	23
1992-12-31	26
1993-06-30	24
1993-12-31	31
1994-06-30	29
1994-12-31	25
1995-06-30	29
1995-12-31	42
1996-06-30	67
1996-12-31	106
1997-06-30	100
1997-12-31	100
1998-06-30	95
1998-12-31	83
1999-06-30	57