Bi-annual	US dollars
1987-06-30	69
1987-12-31	113
1988-06-30	77
1988-12-31	103
1989-06-30	57
1989-12-31	32
1990-06-30	51
1990-12-31	66
1991-06-30	66
1991-12-31	105
1992-06-30	116
1992-12-31	156
1993-06-30	156
1993-12-31	217
1994-06-30	230
1994-12-31	272
1995-06-30	243
1995-12-31	143
1996-06-30	152
1996-12-31	238
1997-06-30	155
1997-12-31	229
1998-06-30	98
1998-12-31	205
1999-06-30	147