Bi-annual	US dollars
1987-06-30	37
1987-12-31	40
1988-06-30	41
1988-12-31	52
1989-06-30	67
1989-12-31	63
1990-06-30	65
1990-12-31	58
1991-06-30	47
1991-12-31	88
1992-06-30	46
1992-12-31	62
1993-06-30	60
1993-12-31	47
1994-06-30	39
1994-12-31	38
1995-06-30	22
1995-12-31	29
1996-06-30	28
1996-12-31	94
1997-06-30	138
1997-12-31	140
1998-06-30	137
1998-12-31	171
1999-06-30	114