Bi-annual	US dollars
1987-06-30	129
1987-12-31	100
1988-06-30	95
1988-12-31	100
1989-06-30	51
1989-12-31	22
1990-06-30	31
1990-12-31	8
1991-06-30	14
1991-12-31	11
1992-06-30	45
1992-12-31	48
1993-06-30	48
1993-12-31	55
1994-06-30	46
1994-12-31	11
1995-06-30	46
1995-12-31	43
1996-06-30	48
1996-12-31	67
1997-06-30	103
1997-12-31	54
1998-06-30	63
1998-12-31	32
1999-06-30	30