Bi-annual	US dollars
1987-06-30	45
1987-12-31	2
1988-06-30	5
1988-12-31	2
1989-06-30	25
1989-12-31	5
1990-06-30	2
1990-12-31	2
1991-06-30	5
1991-12-31	17
1992-06-30	46
1992-12-31	24
1993-06-30	18
1993-12-31	12
1994-06-30	66
1994-12-31	263
1995-06-30	173
1995-12-31	385
1996-06-30	336
1996-12-31	267
1997-06-30	286
1997-12-31	237
1998-06-30	442
1998-12-31	215
1999-06-30	289