Bi-annual	US dollars
1987-06-30	10
1987-12-31	8
1988-06-30	17
1988-12-31	22
1989-06-30	29
1989-12-31	15
1990-06-30	31
1990-12-31	2
1991-06-30	8
1991-12-31	4
1992-06-30	4
1992-12-31	2
1993-06-30	53
1993-12-31	27
1994-06-30	31
1994-12-31	23
1995-06-30	32
1995-12-31	36
1996-06-30	84
1996-12-31	29
1997-06-30	42
1997-12-31	196
1998-06-30	12
1998-12-31	25
1999-06-30	14