Bi-annual	US dollars
1987-06-30	323
1987-12-31	196
1988-06-30	174
1988-12-31	297
1989-06-30	217
1989-12-31	343
1990-06-30	312
1990-12-31	164
1991-06-30	274
1991-12-31	275
1992-06-30	154
1992-12-31	185
1993-06-30	428
1993-12-31	330
1994-06-30	352
1994-12-31	324
1995-06-30	218
1995-12-31	183
1996-06-30	194
1996-12-31	228
1997-06-30	198
1997-12-31	225
1998-06-30	208
1998-12-31	116
1999-06-30	389