Bi-annual	US dollars
1987-06-30	135
1987-12-31	159
1988-06-30	239
1988-12-31	222
1989-06-30	60
1989-12-31	56
1990-06-30	75
1990-12-31	25
1991-06-30	23
1991-12-31	88
1992-06-30	200
1992-12-31	27
1993-06-30	62
1993-12-31	81
1994-06-30	66
1994-12-31	2
1995-06-30	5
1995-12-31	131
1996-06-30	197
1996-12-31	217
1997-06-30	233
1997-12-31	209
1998-06-30	405
1998-12-31	111
1999-06-30	342