Bi-annual	US dollars
1987-06-30	13
1987-12-31	9
1988-06-30	29
1988-12-31	33
1989-06-30	22
1989-12-31	32
1990-06-30	134
1990-12-31	21
1991-06-30	71
1991-12-31	82
1992-06-30	34
1992-12-31	36
1993-06-30	29
1993-12-31	22
1994-06-30	117
1994-12-31	25
1995-06-30	27
1995-12-31	33
1996-06-30	28
1996-12-31	36
1997-06-30	30
1997-12-31	36
1998-06-30	80
1998-12-31	95
1999-06-30	106