Bi-annual	US dollars
1987-06-30	40
1987-12-31	38
1988-06-30	27
1988-12-31	31
1989-06-30	20
1989-12-31	15
1990-06-30	16
1990-12-31	14
1991-06-30	16
1991-12-31	9
1992-06-30	6
1992-12-31	21
1993-06-30	26
1993-12-31	16
1994-06-30	11
1994-12-31	13
1995-06-30	5
1995-12-31	5
1996-06-30	3
1996-12-31	19
1997-06-30	13
1997-12-31	16
1998-06-30	12
1998-12-31	33
1999-06-30	27