Bi-annual	US dollars
1987-06-30	40
1987-12-31	42
1988-06-30	46
1988-12-31	43
1989-06-30	39
1989-12-31	48
1990-06-30	129
1990-12-31	54
1991-06-30	60
1991-12-31	49
1992-06-30	57
1992-12-31	50
1993-06-30	54
1993-12-31	83
1994-06-30	74
1994-12-31	55
1995-06-30	59
1995-12-31	59
1996-06-30	31
1996-12-31	53
1997-06-30	72
1997-12-31	123
1998-06-30	75
1998-12-31	62
1999-06-30	38