Bi-annual	US dollars
1987-06-30	127
1987-12-31	145
1988-06-30	164
1988-12-31	183
1989-06-30	28
1989-12-31	32
1990-06-30	30
1990-12-31	85
1991-06-30	76
1991-12-31	75
1992-06-30	65
1992-12-31	67
1993-06-30	35
1993-12-31	25
1994-06-30	20
1994-12-31	31
1995-06-30	40
1995-12-31	47
1996-06-30	44
1996-12-31	39
1997-06-30	27
1997-12-31	28
1998-06-30	20
1998-12-31	37
1999-06-30	43