Bi-annual	US dollars
1987-06-30	89
1987-12-31	94
1988-06-30	63
1988-12-31	47
1989-06-30	33
1989-12-31	53
1990-06-30	58
1990-12-31	68
1991-06-30	60
1991-12-31	45
1992-06-30	49
1992-12-31	61
1993-06-30	78
1993-12-31	61
1994-06-30	65
1994-12-31	77
1995-06-30	60
1995-12-31	81
1996-06-30	40
1996-12-31	31
1997-06-30	70
1997-12-31	51
1998-06-30	75
1998-12-31	97
1999-06-30	58