Bi-annual	US dollars
1987-06-30	8
1987-12-31	8
1988-06-30	29
1988-12-31	22
1989-06-30	36
1989-12-31	37
1990-06-30	16
1990-12-31	25
1991-06-30	76
1991-12-31	0
1992-06-30	80
1992-12-31	76
1993-06-30	83
1993-12-31	83
1994-06-30	82
1994-12-31	59
1995-06-30	46
1995-12-31	53
1996-06-30	117
1996-12-31	48
1997-06-30	42
1997-12-31	102
1998-06-30	617
1998-12-31	504
1999-06-30	408