Bi-annual	US dollars
1987-06-30	408
1987-12-31	434
1988-06-30	503
1988-12-31	407
1989-06-30	394
1989-12-31	342
1990-06-30	490
1990-12-31	421
1991-06-30	644
1991-12-31	529
1992-06-30	615
1992-12-31	85
1993-06-30	386
1993-12-31	33
1994-06-30	56
1994-12-31	149
1995-06-30	145
1995-12-31	149
1996-06-30	163
1996-12-31	192
1997-06-30	190
1997-12-31	324
1998-06-30	155
1998-12-31	63
1999-06-30	47