Bi-annual	US dollars
1987-06-30	116
1987-12-31	142
1988-06-30	116
1988-12-31	146
1989-06-30	150
1989-12-31	39
1990-06-30	260
1990-12-31	216
1991-06-30	13
1991-12-31	129
1992-06-30	118
1992-12-31	108
1993-06-30	104
1993-12-31	401
1994-06-30	440
1994-12-31	393
1995-06-30	352
1995-12-31	253
1996-06-30	197
1996-12-31	192
1997-06-30	65
1997-12-31	39
1998-06-30	68
1998-12-31	70
1999-06-30	46