Bi-annual	US dollars
1987-06-30	2
1987-12-31	4
1988-06-30	5
1988-12-31	5
1989-06-30	11
1989-12-31	8
1990-06-30	2
1990-12-31	4
1991-06-30	8
1991-12-31	2
1992-06-30	6
1992-12-31	15
1993-06-30	17
1993-12-31	31
1994-06-30	26
1994-12-31	28
1995-06-30	25
1995-12-31	25
1996-06-30	25
1996-12-31	43
1997-06-30	37
1997-12-31	51
1998-06-30	68
1998-12-31	50
1999-06-30	46