Bi-annual	US dollars
1987-06-30	32
1987-12-31	21
1988-06-30	10
1988-12-31	9
1989-06-30	5
1989-12-31	11
1990-06-30	21
1990-12-31	62
1991-06-30	19
1991-12-31	13
1992-06-30	80
1992-12-31	71
1993-06-30	51
1993-12-31	46
1994-06-30	39
1994-12-31	22
1995-06-30	14
1995-12-31	8
1996-06-30	9
1996-12-31	12
1997-06-30	30
1997-12-31	28
1998-06-30	10
1998-12-31	22
1999-06-30	17