Bi-annual	US dollars
1987-06-30	47
1987-12-31	8
1988-06-30	43
1988-12-31	11
1989-06-30	9
1989-12-31	5
1990-06-30	12
1990-12-31	23
1991-06-30	26
1991-12-31	9
1992-06-30	11
1992-12-31	8
1993-06-30	18
1993-12-31	40
1994-06-30	11
1994-12-31	41
1995-06-30	45
1995-12-31	34
1996-06-30	17
1996-12-31	29
1997-06-30	33
1997-12-31	36
1998-06-30	27
1998-12-31	20
1999-06-30	13