Bi-annual	US dollars
1987-06-30	718
1987-12-31	1015
1988-06-30	883
1988-12-31	687
1989-06-30	989
1989-12-31	782
1990-06-30	541
1990-12-31	315
1991-06-30	154
1991-12-31	144
1992-06-30	78
1992-12-31	42
1993-06-30	30
1993-12-31	25
1994-06-30	22
1994-12-31	16
1995-06-30	13
1995-12-31	12
1996-06-30	12
1996-12-31	17
1997-06-30	15
1997-12-31	15
1998-06-30	15
1998-12-31	15
1999-06-30	9