Bi-annual	US dollars
1987-06-30	8
1987-12-31	8
1988-06-30	9
1988-12-31	9
1989-06-30	11
1989-12-31	8
1990-06-30	3
1990-12-31	6
1991-06-30	3
1991-12-31	4
1992-06-30	6
1992-12-31	6
1993-06-30	12
1993-12-31	15
1994-06-30	20
1994-12-31	22
1995-06-30	30
1995-12-31	36
1996-06-30	34
1996-12-31	51
1997-06-30	43
1997-12-31	54
1998-06-30	95
1998-12-31	68
1999-06-30	95