Bi-annual	US dollars
1987-06-30	10
1987-12-31	8
1988-06-30	9
1988-12-31	5
1989-06-30	5
1989-12-31	6
1990-06-30	9
1990-12-31	10
1991-06-30	10
1991-12-31	6
1992-06-30	10
1992-12-31	14
1993-06-30	17
1993-12-31	34
1994-06-30	22
1994-12-31	42
1995-06-30	138
1995-12-31	226
1996-06-30	157
1996-12-31	77
1997-06-30	108
1997-12-31	82
1998-06-30	80
1998-12-31	116
1999-06-30	115