Bi-annual	US dollars
1987-06-30	39
1987-12-31	57
1988-06-30	43
1988-12-31	125
1989-06-30	36
1989-12-31	50
1990-06-30	56
1990-12-31	54
1991-06-30	36
1991-12-31	92
1992-06-30	99
1992-12-31	198
1993-06-30	195
1993-12-31	234
1994-06-30	179
1994-12-31	102
1995-06-30	153
1995-12-31	112
1996-06-30	225
1996-12-31	53
1997-06-30	60
1997-12-31	72
1998-06-30	68
1998-12-31	110
1999-06-30	172