Bi-annual	US dollars
1987-06-30	90
1987-12-31	28
1988-06-30	43
1988-12-31	18
1989-06-30	43
1989-12-31	34
1990-06-30	30
1990-12-31	23
1991-06-30	58
1991-12-31	22
1992-06-30	29
1992-12-31	38
1993-06-30	86
1993-12-31	38
1994-06-30	5
1994-12-31	14
1995-06-30	8
1995-12-31	11
1996-06-30	8
1996-12-31	29
1997-06-30	20
1997-12-31	33
1998-06-30	57
1998-12-31	47
1999-06-30	120