Bi-annual	US dollars
1987-06-30	229
1987-12-31	211
1988-06-30	157
1988-12-31	80
1989-06-30	50
1989-12-31	0
1990-06-30	0
1990-12-31	0
1991-06-30	0
1991-12-31	0
1992-06-30	0
1992-12-31	23
1993-06-30	23
1993-12-31	25
1994-06-30	22
1994-12-31	30
1995-06-30	29
1995-12-31	47
1996-06-30	53
1996-12-31	56
1997-06-30	60
1997-12-31	69
1998-06-30	77
1998-12-31	73
1999-06-30	63