Bi-annual	US dollars
1987-06-30	19
1987-12-31	11
1988-06-30	10
1988-12-31	20
1989-06-30	20
1989-12-31	23
1990-06-30	10
1990-12-31	12
1991-06-30	15
1991-12-31	15
1992-06-30	6
1992-12-31	5
1993-06-30	41
1993-12-31	10
1994-06-30	12
1994-12-31	19
1995-06-30	17
1995-12-31	2
1996-06-30	19
1996-12-31	5
1997-06-30	3
1997-12-31	25
1998-06-30	55
1998-12-31	52
1999-06-30	90