Bi-annual	US dollars
1987-06-30	3
1987-12-31	38
1988-06-30	10
1988-12-31	5
1989-06-30	9
1989-12-31	10
1990-06-30	17
1990-12-31	8
1991-06-30	2
1991-12-31	7
1992-06-30	2
1992-12-31	11
1993-06-30	11
1993-12-31	7
1994-06-30	11
1994-12-31	11
1995-06-30	22
1995-12-31	16
1996-06-30	20
1996-12-31	24
1997-06-30	23
1997-12-31	21
1998-06-30	22
1998-12-31	123
1999-06-30	71