Bi-annual	US dollars
1987-06-30	29
1987-12-31	62
1988-06-30	27
1988-12-31	34
1989-06-30	56
1989-12-31	74
1990-06-30	73
1990-12-31	93
1991-06-30	45
1991-12-31	80
1992-06-30	122
1992-12-31	79
1993-06-30	108
1993-12-31	98
1994-06-30	66
1994-12-31	74
1995-06-30	73
1995-12-31	60
1996-06-30	67
1996-12-31	140
1997-06-30	105
1997-12-31	71
1998-06-30	153
1998-12-31	65
1999-06-30	159