Bi-annual	US dollars
1987-06-30	23
1987-12-31	25
1988-06-30	22
1988-12-31	22
1989-06-30	9
1989-12-31	18
1990-06-30	24
1990-12-31	10
1991-06-30	21
1991-12-31	9
1992-06-30	13
1992-12-31	14
1993-06-30	12
1993-12-31	46
1994-06-30	51
1994-12-31	45
1995-06-30	22
1995-12-31	57
1996-06-30	19
1996-12-31	19
1997-06-30	18
1997-12-31	18
1998-06-30	28
1998-12-31	32
1999-06-30	170