Bi-annual	US dollars
1987-06-30	63
1987-12-31	43
1988-06-30	48
1988-12-31	43
1989-06-30	39
1989-12-31	37
1990-06-30	35
1990-12-31	33
1991-06-30	26
1991-12-31	24
1992-06-30	13
1992-12-31	15
1993-06-30	15
1993-12-31	22
1994-06-30	11
1994-12-31	11
1995-06-30	10
1995-12-31	12
1996-06-30	25
1996-12-31	38
1997-06-30	72
1997-12-31	71
1998-06-30	73
1998-12-31	55
1999-06-30	55