Bi-annual	US dollars
1987-06-30	16
1987-12-31	9
1988-06-30	14
1988-12-31	4
1989-06-30	12
1989-12-31	2
1990-06-30	12
1990-12-31	12
1991-06-30	26
1991-12-31	30
1992-06-30	59
1992-12-31	121
1993-06-30	120
1993-12-31	80
1994-06-30	15
1994-12-31	13
1995-06-30	6
1995-12-31	3
1996-06-30	37
1996-12-31	68
1997-06-30	62
1997-12-31	38
1998-06-30	33
1998-12-31	23
1999-06-30	20