Bi-annual	US dollars
1987-06-30	56
1987-12-31	68
1988-06-30	67
1988-12-31	34
1989-06-30	40
1989-12-31	42
1990-06-30	35
1990-12-31	41
1991-06-30	13
1991-12-31	11
1992-06-30	4
1992-12-31	21
1993-06-30	36
1993-12-31	81
1994-06-30	99
1994-12-31	95
1995-06-30	118
1995-12-31	109
1996-06-30	129
1996-12-31	110
1997-06-30	100
1997-12-31	114
1998-06-30	80
1998-12-31	68
1999-06-30	106