Bi-annual	US dollars
1987-06-30	31
1987-12-31	40
1988-06-30	22
1988-12-31	40
1989-06-30	19
1989-12-31	8
1990-06-30	12
1990-12-31	21
1991-06-30	6
1991-12-31	24
1992-06-30	67
1992-12-31	50
1993-06-30	51
1993-12-31	58
1994-06-30	40
1994-12-31	8
1995-06-30	5
1995-12-31	11
1996-06-30	8
1996-12-31	2
1997-06-30	3
1997-12-31	23
1998-06-30	13
1998-12-31	18
1999-06-30	8