Bi-annual	US dollars
1987-06-30	77
1987-12-31	87
1988-06-30	99
1988-12-31	85
1989-06-30	88
1989-12-31	40
1990-06-30	80
1990-12-31	41
1991-06-30	28
1991-12-31	64
1992-06-30	61
1992-12-31	80
1993-06-30	117
1993-12-31	53
1994-06-30	42
1994-12-31	38
1995-06-30	24
1995-12-31	31
1996-06-30	40
1996-12-31	26
1997-06-30	72
1997-12-31	127
1998-06-30	57
1998-12-31	57
1999-06-30	50