Bi-annual	US dollars
1987-06-30	66
1987-12-31	75
1988-06-30	48
1988-12-31	85
1989-06-30	48
1989-12-31	58
1990-06-30	52
1990-12-31	75
1991-06-30	135
1991-12-31	82
1992-06-30	114
1992-12-31	64
1993-06-30	71
1993-12-31	823
1994-06-30	898
1994-12-31	864
1995-06-30	967
1995-12-31	1096
1996-06-30	1227
1996-12-31	1157
1997-06-30	1318
1997-12-31	1626
1998-06-30	1676
1998-12-31	1255
1999-06-30	1041