Bi-annual	US dollars
1987-06-30	18
1987-12-31	26
1988-06-30	19
1988-12-31	4
1989-06-30	6
1989-12-31	13
1990-06-30	5
1990-12-31	10
1991-06-30	10
1991-12-31	24
1992-06-30	11
1992-12-31	11
1993-06-30	14
1993-12-31	9
1994-06-30	26
1994-12-31	11
1995-06-30	22
1995-12-31	12
1996-06-30	11
1996-12-31	12
1997-06-30	28
1997-12-31	23
1998-06-30	30
1998-12-31	38
1999-06-30	24