Bi-annual	US dollars
1987-06-30	29
1987-12-31	32
1988-06-30	94
1988-12-31	33
1989-06-30	22
1989-12-31	19
1990-06-30	30
1990-12-31	31
1991-06-30	36
1991-12-31	17
1992-06-30	17
1992-12-31	14
1993-06-30	12
1993-12-31	0
1994-06-30	14
1994-12-31	8
1995-06-30	6
1995-12-31	5
1996-06-30	3
1996-12-31	0
1997-06-30	0
1997-12-31	23
1998-06-30	12
1998-12-31	38
1999-06-30	20