Bi-annual	US dollars
1987-06-30	42
1987-12-31	11
1988-06-30	3
1988-12-31	25
1989-06-30	28
1989-12-31	173
1990-06-30	24
1990-12-31	77
1991-06-30	42
1991-12-31	149
1992-06-30	118
1992-12-31	20
1993-06-30	204
1993-12-31	99
1994-06-30	199
1994-12-31	249
1995-06-30	46
1995-12-31	26
1996-06-30	36
1996-12-31	224
1997-06-30	28
1997-12-31	30
1998-06-30	30
1998-12-31	73
1999-06-30	63