Bi-annual	US dollars
1987-06-30	90
1987-12-31	57
1988-06-30	78
1988-12-31	61
1989-06-30	45
1989-12-31	56
1990-06-30	78
1990-12-31	15
1991-06-30	16
1991-12-31	9
1992-06-30	11
1992-12-31	6
1993-06-30	6
1993-12-31	31
1994-06-30	28
1994-12-31	30
1995-06-30	80
1995-12-31	40
1996-06-30	16
1996-12-31	50
1997-06-30	18
1997-12-31	13
1998-06-30	22
1998-12-31	20
1999-06-30	9