Bi-annual	US dollars
1987-06-30	113
1987-12-31	100
1988-06-30	72
1988-12-31	71
1989-06-30	71
1989-12-31	61
1990-06-30	58
1990-12-31	31
1991-06-30	24
1991-12-31	11
1992-06-30	10
1992-12-31	18
1993-06-30	-2
1993-12-31	15
1994-06-30	11
1994-12-31	2
1995-06-30	3
1995-12-31	5
1996-06-30	5
1996-12-31	9
1997-06-30	17
1997-12-31	48
1998-06-30	43
1998-12-31	40
1999-06-30	33