Bi-annual	US dollars
1987-06-30	13
1987-12-31	13
1988-06-30	31
1988-12-31	61
1989-06-30	42
1989-12-31	6
1990-06-30	10
1990-12-31	4
1991-06-30	6
1991-12-31	19
1992-06-30	11
1992-12-31	68
1993-06-30	17
1993-12-31	28
1994-06-30	15
1994-12-31	13
1995-06-30	16
1995-12-31	29
1996-06-30	51
1996-12-31	56
1997-06-30	60
1997-12-31	20
1998-06-30	22
1998-12-31	23
1999-06-30	9