Bi-annual	US dollars
1987-06-30	45
1987-12-31	45
1988-06-30	43
1988-12-31	34
1989-06-30	25
1989-12-31	23
1990-06-30	19
1990-12-31	12
1991-06-30	6
1991-12-31	21
1992-06-30	10
1992-12-31	6
1993-06-30	15
1993-12-31	24
1994-06-30	35
1994-12-31	39
1995-06-30	38
1995-12-31	48
1996-06-30	53
1996-12-31	62
1997-06-30	58
1997-12-31	58
1998-06-30	55
1998-12-31	50
1999-06-30	43