Bi-annual	US dollars
1987-06-30	90
1987-12-31	17
1988-06-30	31
1988-12-31	25
1989-06-30	26
1989-12-31	26
1990-06-30	28
1990-12-31	33
1991-06-30	39
1991-12-31	374
1992-06-30	375
1992-12-31	561
1993-06-30	378
1993-12-31	318
1994-06-30	273
1994-12-31	210
1995-06-30	84
1995-12-31	65
1996-06-30	44
1996-12-31	14
1997-06-30	38
1997-12-31	49
1998-06-30	18
1998-12-31	12
1999-06-30	11