Bi-annual	US dollars
1987-06-30	35
1987-12-31	19
1988-06-30	19
1988-12-31	16
1989-06-30	14
1989-12-31	19
1990-06-30	24
1990-12-31	108
1991-06-30	32
1991-12-31	37
1992-06-30	29
1992-12-31	17
1993-06-30	36
1993-12-31	22
1994-06-30	46
1994-12-31	28
1995-06-30	31
1995-12-31	37
1996-06-30	28
1996-12-31	41
1997-06-30	52
1997-12-31	163
1998-06-30	107
1998-12-31	155
1999-06-30	91