Bi-annual	US dollars
1987-06-30	121
1987-12-31	100
1988-06-30	125
1988-12-31	71
1989-06-30	39
1989-12-31	61
1990-06-30	120
1990-12-31	210
1991-06-30	120
1991-12-31	92
1992-06-30	206
1992-12-31	150
1993-06-30	176
1993-12-31	95
1994-06-30	97
1994-12-31	171
1995-06-30	159
1995-12-31	110
1996-06-30	47
1996-12-31	68
1997-06-30	333
1997-12-31	100
1998-06-30	100
1998-12-31	261
1999-06-30	263