Bi-annual	US dollars
1987-06-30	63
1987-12-31	51
1988-06-30	104
1988-12-31	137
1989-06-30	31
1989-12-31	108
1990-06-30	10
1990-12-31	158
1991-06-30	102
1991-12-31	144
1992-06-30	95
1992-12-31	111
1993-06-30	165
1993-12-31	53
1994-06-30	289
1994-12-31	69
1995-06-30	22
1995-12-31	19
1996-06-30	96
1996-12-31	67
1997-06-30	20
1997-12-31	28
1998-06-30	15
1998-12-31	8
1999-06-30	27