Bi-annual	US dollars
1987-06-30	32
1987-12-31	49
1988-06-30	53
1988-12-31	51
1989-06-30	40
1989-12-31	52
1990-06-30	37
1990-12-31	33
1991-06-30	28
1991-12-31	26
1992-06-30	114
1992-12-31	94
1993-06-30	101
1993-12-31	99
1994-06-30	79
1994-12-31	34
1995-06-30	30
1995-12-31	36
1996-06-30	34
1996-12-31	63
1997-06-30	90
1997-12-31	67
1998-06-30	75
1998-12-31	120
1999-06-30	96