Bi-annual	US dollars
1987-06-30	16
1987-12-31	23
1988-06-30	15
1988-12-31	24
1989-06-30	9
1989-12-31	2
1990-06-30	14
1990-12-31	10
1991-06-30	10
1991-12-31	2
1992-06-30	2
1992-12-31	11
1993-06-30	14
1993-12-31	13
1994-06-30	19
1994-12-31	19
1995-06-30	24
1995-12-31	20
1996-06-30	20
1996-12-31	22
1997-06-30	32
1997-12-31	21
1998-06-30	27
1998-12-31	32
1999-06-30	35