Bi-annual	US dollars
1987-06-30	195
1987-12-31	160
1988-06-30	186
1988-12-31	65
1989-06-30	110
1989-12-31	95
1990-06-30	23
1990-12-31	12
1991-06-30	15
1991-12-31	28
1992-06-30	15
1992-12-31	11
1993-06-30	20
1993-12-31	38
1994-06-30	40
1994-12-31	55
1995-06-30	234
1995-12-31	299
1996-06-30	219
1996-12-31	286
1997-06-30	245
1997-12-31	239
1998-06-30	273
1998-12-31	283
1999-06-30	325