Bi-annual	US dollars
1987-06-30	123
1987-12-31	66
1988-06-30	193
1988-12-31	134
1989-06-30	122
1989-12-31	124
1990-06-30	127
1990-12-31	145
1991-06-30	154
1991-12-31	237
1992-06-30	615
1992-12-31	279
1993-06-30	731
1993-12-31	785
1994-06-30	840
1994-12-31	1047
1995-06-30	1088
1995-12-31	1271
1996-06-30	1743
1996-12-31	2123
1997-06-30	2436
1997-12-31	3029
1998-06-30	3024
1998-12-31	2205
1999-06-30	1667