Bi-annual	US dollars
1987-06-30	24
1987-12-31	32
1988-06-30	24
1988-12-31	22
1989-06-30	14
1989-12-31	10
1990-06-30	12
1990-12-31	15
1991-06-30	15
1991-12-31	7
1992-06-30	25
1992-12-31	23
1993-06-30	39
1993-12-31	34
1994-06-30	43
1994-12-31	31
1995-06-30	24
1995-12-31	48
1996-06-30	39
1996-12-31	294
1997-06-30	388
1997-12-31	123
1998-06-30	155
1998-12-31	186
1999-06-30	104