Bi-annual	US dollars
1987-06-30	231
1987-12-31	164
1988-06-30	150
1988-12-31	136
1989-06-30	107
1989-12-31	124
1990-06-30	84
1990-12-31	60
1991-06-30	52
1991-12-31	60
1992-06-30	55
1992-12-31	38
1993-06-30	24
1993-12-31	19
1994-06-30	0
1994-12-31	5
1995-06-30	6
1995-12-31	17
1996-06-30	12
1996-12-31	87
1997-06-30	38
1997-12-31	20
1998-06-30	8
1998-12-31	12
1999-06-30	19