Bi-annual	US dollars
1987-06-30	48
1987-12-31	45
1988-06-30	43
1988-12-31	36
1989-06-30	36
1989-12-31	24
1990-06-30	19
1990-12-31	21
1991-06-30	15
1991-12-31	11
1992-06-30	17
1992-12-31	18
1993-06-30	27
1993-12-31	28
1994-06-30	35
1994-12-31	34
1995-06-30	45
1995-12-31	56
1996-06-30	57
1996-12-31	75
1997-06-30	85
1997-12-31	107
1998-06-30	157
1998-12-31	168
1999-06-30	169