Bi-annual	US dollars
1987-06-30	3
1987-12-31	4
1988-06-30	9
1988-12-31	7
1989-06-30	5
1989-12-31	5
1990-06-30	7
1990-12-31	8
1991-06-30	8
1991-12-31	13
1992-06-30	8
1992-12-31	11
1993-06-30	12
1993-12-31	21
1994-06-30	22
1994-12-31	23
1995-06-30	21
1995-12-31	28
1996-06-30	31
1996-12-31	39
1997-06-30	75
1997-12-31	48
1998-06-30	65
1998-12-31	60
1999-06-30	46