Bi-annual	US dollars
1987-06-30	114
1987-12-31	136
1988-06-30	164
1988-12-31	58
1989-06-30	105
1989-12-31	50
1990-06-30	110
1990-12-31	127
1991-06-30	50
1991-12-31	92
1992-06-30	70
1992-12-31	21
1993-06-30	20
1993-12-31	28
1994-06-30	42
1994-12-31	75
1995-06-30	10
1995-12-31	102
1996-06-30	104
1996-12-31	80
1997-06-30	48
1997-12-31	10
1998-06-30	122
1998-12-31	0
1999-06-30	39