Bi-annual	US dollars
1987-06-30	95
1987-12-31	104
1988-06-30	84
1988-12-31	89
1989-06-30	288
1989-12-31	119
1990-06-30	84
1990-12-31	48
1991-06-30	193
1991-12-31	114
1992-06-30	129
1992-12-31	117
1993-06-30	107
1993-12-31	101
1994-06-30	117
1994-12-31	147
1995-06-30	130
1995-12-31	102
1996-06-30	197
1996-12-31	226
1997-06-30	231
1997-12-31	176
1998-06-30	187
1998-12-31	75
1999-06-30	50