Bi-annual	US dollars
1987-06-30	79
1987-12-31	77
1988-06-30	53
1988-12-31	90
1989-06-30	166
1989-12-31	155
1990-06-30	209
1990-12-31	309
1991-06-30	170
1991-12-31	170
1992-06-30	228
1992-12-31	205
1993-06-30	227
1993-12-31	117
1994-06-30	247
1994-12-31	197
1995-06-30	186
1995-12-31	157
1996-06-30	157
1996-12-31	86
1997-06-30	195
1997-12-31	109
1998-06-30	178
1998-12-31	186
1999-06-30	230