Bi-annual	US dollars
1987-06-30	21
1987-12-31	25
1988-06-30	26
1988-12-31	14
1989-06-30	20
1989-12-31	111
1990-06-30	106
1990-12-31	116
1991-06-30	37
1991-12-31	11
1992-06-30	25
1992-12-31	30
1993-06-30	56
1993-12-31	35
1994-06-30	23
1994-12-31	33
1995-06-30	38
1995-12-31	39
1996-06-30	39
1996-12-31	48
1997-06-30	75
1997-12-31	81
1998-06-30	142
1998-12-31	123
1999-06-30	128