Bi-annual	US dollars
1987-06-30	292
1987-12-31	268
1988-06-30	244
1988-12-31	179
1989-06-30	181
1989-12-31	119
1990-06-30	112
1990-12-31	75
1991-06-30	60
1991-12-31	67
1992-06-30	44
1992-12-31	32
1993-06-30	44
1993-12-31	198
1994-06-30	202
1994-12-31	180
1995-06-30	196
1995-12-31	138
1996-06-30	37
1996-12-31	22
1997-06-30	55
1997-12-31	31
1998-06-30	28
1998-12-31	18
1999-06-30	38