Bi-annual	US dollars
1987-06-30	142
1987-12-31	147
1988-06-30	99
1988-12-31	87
1989-06-30	47
1989-12-31	50
1990-06-30	28
1990-12-31	75
1991-06-30	89
1991-12-31	110
1992-06-30	101
1992-12-31	400
1993-06-30	417
1993-12-31	406
1994-06-30	426
1994-12-31	582
1995-06-30	671
1995-12-31	805
1996-06-30	1181
1996-12-31	1489
1997-06-30	1627
1997-12-31	2004
1998-06-30	1884
1998-12-31	2607
1999-06-30	2108