Bi-annual	US dollars
1987-06-30	29
1987-12-31	25
1988-06-30	46
1988-12-31	36
1989-06-30	16
1989-12-31	19
1990-06-30	9
1990-12-31	23
1991-06-30	10
1991-12-31	54
1992-06-30	38
1992-12-31	67
1993-06-30	158
1993-12-31	136
1994-06-30	79
1994-12-31	97
1995-06-30	126
1995-12-31	90
1996-06-30	75
1996-12-31	75
1997-06-30	72
1997-12-31	30
1998-06-30	67
1998-12-31	73
1999-06-30	79