Bi-annual	US dollars
1987-06-30	184
1987-12-31	217
1988-06-30	249
1988-12-31	318
1989-06-30	512
1989-12-31	134
1990-06-30	326
1990-12-31	232
1991-06-30	167
1991-12-31	170
1992-06-30	322
1992-12-31	479
1993-06-30	131
1993-12-31	325
1994-06-30	298
1994-12-31	324
1995-06-30	308
1995-12-31	250
1996-06-30	354
1996-12-31	82
1997-06-30	146
1997-12-31	179
1998-06-30	322
1998-12-31	428
1999-06-30	159