Bi-annual	US dollars
1987-06-30	232
1987-12-31	236
1988-06-30	222
1988-12-31	168
1989-06-30	68
1989-12-31	47
1990-06-30	78
1990-12-31	66
1991-06-30	65
1991-12-31	71
1992-06-30	122
1992-12-31	127
1993-06-30	144
1993-12-31	114
1994-06-30	154
1994-12-31	192
1995-06-30	208
1995-12-31	163
1996-06-30	284
1996-12-31	216
1997-06-30	226
1997-12-31	179
1998-06-30	122
1998-12-31	45
1999-06-30	79