Bi-annual	US dollars
1987-06-30	8
1987-12-31	21
1988-06-30	24
1988-12-31	43
1989-06-30	23
1989-12-31	10
1990-06-30	21
1990-12-31	21
1991-06-30	26
1991-12-31	26
1992-06-30	21
1992-12-31	14
1993-06-30	15
1993-12-31	13
1994-06-30	17
1994-12-31	23
1995-06-30	21
1995-12-31	37
1996-06-30	31
1996-12-31	53
1997-06-30	50
1997-12-31	41
1998-06-30	25
1998-12-31	37
1999-06-30	14