Bi-annual	US dollars
1987-06-30	63
1987-12-31	34
1988-06-30	27
1988-12-31	31
1989-06-30	16
1989-12-31	10
1990-06-30	2
1990-12-31	12
1991-06-30	18
1991-12-31	2
1992-06-30	29
1992-12-31	5
1993-06-30	20
1993-12-31	16
1994-06-30	26
1994-12-31	42
1995-06-30	33
1995-12-31	65
1996-06-30	59
1996-12-31	74
1997-06-30	42
1997-12-31	79
1998-06-30	58
1998-12-31	245
1999-06-30	61