Bi-annual	US dollars
1987-06-30	19
1987-12-31	34
1988-06-30	29
1988-12-31	36
1989-06-30	39
1989-12-31	53
1990-06-30	51
1990-12-31	46
1991-06-30	39
1991-12-31	24
1992-06-30	17
1992-12-31	15
1993-06-30	44
1993-12-31	33
1994-06-30	117
1994-12-31	103
1995-06-30	151
1995-12-31	150
1996-06-30	256
1996-12-31	226
1997-06-30	231
1997-12-31	255
1998-06-30	138
1998-12-31	143
1999-06-30	166