Bi-annual	US dollars
1987-06-30	18
1987-12-31	19
1988-06-30	15
1988-12-31	24
1989-06-30	28
1989-12-31	16
1990-06-30	2
1990-12-31	12
1991-06-30	3
1991-12-31	6
1992-06-30	17
1992-12-31	24
1993-06-30	18
1993-12-31	19
1994-06-30	17
1994-12-31	16
1995-06-30	13
1995-12-31	20
1996-06-30	17
1996-12-31	17
1997-06-30	33
1997-12-31	44
1998-06-30	68
1998-12-31	13
1999-06-30	22