Bi-annual	US dollars
1987-06-30	110
1987-12-31	62
1988-06-30	73
1988-12-31	92
1989-06-30	34
1989-12-31	90
1990-06-30	28
1990-12-31	41
1991-06-30	45
1991-12-31	108
1992-06-30	93
1992-12-31	74
1993-06-30	66
1993-12-31	67
1994-06-30	79
1994-12-31	59
1995-06-30	94
1995-12-31	113
1996-06-30	155
1996-12-31	123
1997-06-30	216
1997-12-31	191
1998-06-30	202
1998-12-31	188
1999-06-30	210