Bi-annual	US dollars
1987-06-30	1198
1987-12-31	1385
1988-06-30	1260
1988-12-31	1258
1989-06-30	1017
1989-12-31	772
1990-06-30	642
1990-12-31	315
1991-06-30	152
1991-12-31	159
1992-06-30	124
1992-12-31	109
1993-06-30	63
1993-12-31	69
1994-06-30	60
1994-12-31	52
1995-06-30	59
1995-12-31	43
1996-06-30	70
1996-12-31	79
1997-06-30	58
1997-12-31	43
1998-06-30	87
1998-12-31	68
1999-06-30	55