Bi-annual	US dollars
1987-06-30	74
1987-12-31	104
1988-06-30	107
1988-12-31	92
1989-06-30	95
1989-12-31	152
1990-06-30	155
1990-12-31	172
1991-06-30	107
1991-12-31	60
1992-06-30	162
1992-12-31	132
1993-06-30	81
1993-12-31	78
1994-06-30	122
1994-12-31	114
1995-06-30	124
1995-12-31	118
1996-06-30	99
1996-12-31	113
1997-06-30	123
1997-12-31	86
1998-06-30	100
1998-12-31	87
1999-06-30	16