Bi-annual	US dollars
1987-06-30	27
1987-12-31	34
1988-06-30	29
1988-12-31	33
1989-06-30	22
1989-12-31	23
1990-06-30	23
1990-12-31	29
1991-06-30	23
1991-12-31	24
1992-06-30	25
1992-12-31	18
1993-06-30	20
1993-12-31	19
1994-06-30	19
1994-12-31	17
1995-06-30	17
1995-12-31	16
1996-06-30	14
1996-12-31	7
1997-06-30	5
1997-12-31	0
1998-06-30	5
1998-12-31	10
1999-06-30	0