Bi-annual	US dollars
1987-06-30	56
1987-12-31	57
1988-06-30	55
1988-12-31	47
1989-06-30	51
1989-12-31	55
1990-06-30	42
1990-12-31	41
1991-06-30	29
1991-12-31	41
1992-06-30	40
1992-12-31	39
1993-06-30	143
1993-12-31	96
1994-06-30	39
1994-12-31	45
1995-06-30	37
1995-12-31	64
1996-06-30	99
1996-12-31	79
1997-06-30	316
1997-12-31	163
1998-06-30	150
1998-12-31	213
1999-06-30	1291