Bi-annual	US dollars
1987-06-30	139
1987-12-31	72
1988-06-30	46
1988-12-31	94
1989-06-30	59
1989-12-31	121
1990-06-30	105
1990-12-31	95
1991-06-30	71
1991-12-31	86
1992-06-30	126
1992-12-31	147
1993-06-30	239
1993-12-31	213
1994-06-30	204
1994-12-31	131
1995-06-30	142
1995-12-31	144
1996-06-30	163
1996-12-31	200
1997-06-30	536
1997-12-31	480
1998-06-30	852
1998-12-31	810
1999-06-30	1988