Bi-annual	US dollars
1987-06-30	2
1987-12-31	19
1988-06-30	38
1988-12-31	54
1989-06-30	51
1989-12-31	16
1990-06-30	31
1990-12-31	29
1991-06-30	55
1991-12-31	9
1992-06-30	53
1992-12-31	26
1993-06-30	590
1993-12-31	109
1994-06-30	113
1994-12-31	99
1995-06-30	121
1995-12-31	42
1996-06-30	73
1996-12-31	96
1997-06-30	68
1997-12-31	293
1998-06-30	238
1998-12-31	536
1999-06-30	9