Bi-annual	US dollars
1987-06-30	48
1987-12-31	47
1988-06-30	41
1988-12-31	42
1989-06-30	36
1989-12-31	35
1990-06-30	28
1990-12-31	29
1991-06-30	26
1991-12-31	28
1992-06-30	25
1992-12-31	23
1993-06-30	21
1993-12-31	18
1994-06-30	19
1994-12-31	17
1995-06-30	17
1995-12-31	17
1996-06-30	17
1996-12-31	17
1997-06-30	17
1997-12-31	16
1998-06-30	15
1998-12-31	13
1999-06-30	16