Bi-annual	US dollars
1987-06-30	26
1987-12-31	25
1988-06-30	17
1988-12-31	27
1989-06-30	14
1989-12-31	15
1990-06-30	9
1990-12-31	14
1991-06-30	16
1991-12-31	11
1992-06-30	25
1992-12-31	11
1993-06-30	15
1993-12-31	7
1994-06-30	11
1994-12-31	17
1995-06-30	13
1995-12-31	6
1996-06-30	5
1996-12-31	12
1997-06-30	10
1997-12-31	12
1998-06-30	10
1998-12-31	5
1999-06-30	3