Bi-annual	US dollars
1987-06-30	45
1987-12-31	32
1988-06-30	46
1988-12-31	36
1989-06-30	22
1989-12-31	55
1990-06-30	61
1990-12-31	29
1991-06-30	41
1991-12-31	37
1992-06-30	48
1992-12-31	14
1993-06-30	21
1993-12-31	28
1994-06-30	29
1994-12-31	59
1995-06-30	54
1995-12-31	96
1996-06-30	48
1996-12-31	68
1997-06-30	161
1997-12-31	217
1998-06-30	230
1998-12-31	238
1999-06-30	30