Bi-annual	US dollars
1987-06-30	111
1987-12-31	55
1988-06-30	53
1988-12-31	60
1989-06-30	48
1989-12-31	53
1990-06-30	54
1990-12-31	60
1991-06-30	49
1991-12-31	49
1992-06-30	53
1992-12-31	42
1993-06-30	102
1993-12-31	217
1994-06-30	279
1994-12-31	95
1995-06-30	107
1995-12-31	87
1996-06-30	93
1996-12-31	149
1997-06-30	128
1997-12-31	206
1998-06-30	308
1998-12-31	241
1999-06-30	197