Bi-annual	US dollars
1987-06-30	431
1987-12-31	364
1988-06-30	268
1988-12-31	253
1989-06-30	143
1989-12-31	144
1990-06-30	164
1990-12-31	125
1991-06-30	120
1991-12-31	101
1992-06-30	103
1992-12-31	105
1993-06-30	87
1993-12-31	137
1994-06-30	106
1994-12-31	155
1995-06-30	162
1995-12-31	109
1996-06-30	106
1996-12-31	113
1997-06-30	60
1997-12-31	97
1998-06-30	102
1998-12-31	256
1999-06-30	65