Bi-annual	US dollars
1987-06-30	85
1987-12-31	223
1988-06-30	333
1988-12-31	69
1989-06-30	84
1989-12-31	113
1990-06-30	119
1990-12-31	25
1991-06-30	66
1991-12-31	47
1992-06-30	17
1992-12-31	76
1993-06-30	32
1993-12-31	35
1994-06-30	102
1994-12-31	102
1995-06-30	105
1995-12-31	245
1996-06-30	47
1996-12-31	92
1997-06-30	33
1997-12-31	127
1998-06-30	205
1998-12-31	251
1999-06-30	207