Bi-annual	US dollars
1987-06-30	197
1987-12-31	264
1988-06-30	97
1988-12-31	56
1989-06-30	88
1989-12-31	69
1990-06-30	45
1990-12-31	179
1991-06-30	139
1991-12-31	133
1992-06-30	284
1992-12-31	102
1993-06-30	116
1993-12-31	77
1994-06-30	51
1994-12-31	95
1995-06-30	121
1995-12-31	57
1996-06-30	39
1996-12-31	51
1997-06-30	42
1997-12-31	71
1998-06-30	57
1998-12-31	298
1999-06-30	117