Bi-annual	US dollars
1987-06-30	19
1987-12-31	55
1988-06-30	20
1988-12-31	16
1989-06-30	28
1989-12-31	37
1990-06-30	40
1990-12-31	29
1991-06-30	13
1991-12-31	17
1992-06-30	6
1992-12-31	11
1993-06-30	15
1993-12-31	25
1994-06-30	17
1994-12-31	27
1995-06-30	24
1995-12-31	19
1996-06-30	25
1996-12-31	94
1997-06-30	27
1997-12-31	28
1998-06-30	110
1998-12-31	102
1999-06-30	115