Bi-annual	US dollars
1987-06-30	56
1987-12-31	79
1988-06-30	85
1988-12-31	107
1989-06-30	87
1989-12-31	81
1990-06-30	68
1990-12-31	75
1991-06-30	63
1991-12-31	62
1992-06-30	82
1992-12-31	58
1993-06-30	53
1993-12-31	18
1994-06-30	15
1994-12-31	16
1995-06-30	11
1995-12-31	9
1996-06-30	64
1996-12-31	51
1997-06-30	2
1997-12-31	0
1998-06-30	8
1998-12-31	8
1999-06-30	16