Bi-annual	US dollars
1987-06-30	6
1987-12-31	4
1988-06-30	5
1988-12-31	16
1989-06-30	6
1989-12-31	18
1990-06-30	16
1990-12-31	19
1991-06-30	13
1991-12-31	2
1992-06-30	27
1992-12-31	5
1993-06-30	6
1993-12-31	12
1994-06-30	15
1994-12-31	22
1995-06-30	13
1995-12-31	5
1996-06-30	3
1996-12-31	34
1997-06-30	43
1997-12-31	28
1998-06-30	23
1998-12-31	98
1999-06-30	80