Bi-annual	US dollars
1987-06-30	87
1987-12-31	123
1988-06-30	43
1988-12-31	43
1989-06-30	84
1989-12-31	45
1990-06-30	26
1990-12-31	8
1991-06-30	60
1991-12-31	75
1992-06-30	259
1992-12-31	206
1993-06-30	203
1993-12-31	61
1994-06-30	179
1994-12-31	236
1995-06-30	199
1995-12-31	198
1996-06-30	204
1996-12-31	168
1997-06-30	215
1997-12-31	173
1998-06-30	155
1998-12-31	145
1999-06-30	139