Bi-annual	US dollars
1987-06-30	44
1987-12-31	51
1988-06-30	78
1988-12-31	71
1989-06-30	25
1989-12-31	56
1990-06-30	47
1990-12-31	54
1991-06-30	18
1991-12-31	19
1992-06-30	23
1992-12-31	32
1993-06-30	23
1993-12-31	15
1994-06-30	20
1994-12-31	30
1995-06-30	25
1995-12-31	25
1996-06-30	3
1996-12-31	10
1997-06-30	8
1997-12-31	3
1998-06-30	5
1998-12-31	5
1999-06-30	5