Bi-annual	US dollars
1987-06-30	52
1987-12-31	40
1988-06-30	41
1988-12-31	67
1989-06-30	88
1989-12-31	31
1990-06-30	17
1990-12-31	12
1991-06-30	18
1991-12-31	13
1992-06-30	17
1992-12-31	20
1993-06-30	21
1993-12-31	13
1994-06-30	20
1994-12-31	44
1995-06-30	27
1995-12-31	22
1996-06-30	14
1996-12-31	31
1997-06-30	25
1997-12-31	54
1998-06-30	33
1998-12-31	93
1999-06-30	13