Bi-annual	US dollars
1987-06-30	216
1987-12-31	153
1988-06-30	131
1988-12-31	286
1989-06-30	208
1989-12-31	198
1990-06-30	73
1990-12-31	54
1991-06-30	42
1991-12-31	75
1992-06-30	78
1992-12-31	97
1993-06-30	162
1993-12-31	121
1994-06-30	144
1994-12-31	127
1995-06-30	122
1995-12-31	87
1996-06-30	73
1996-12-31	173
1997-06-30	143
1997-12-31	217
1998-06-30	454
1998-12-31	399
1999-06-30	367