Bi-annual	US dollars
1987-06-30	39
1987-12-31	47
1988-06-30	73
1988-12-31	459
1989-06-30	384
1989-12-31	453
1990-06-30	157
1990-12-31	199
1991-06-30	308
1991-12-31	304
1992-06-30	186
1992-12-31	109
1993-06-30	84
1993-12-31	225
1994-06-30	247
1994-12-31	69
1995-06-30	103
1995-12-31	122
1996-06-30	101
1996-12-31	43
1997-06-30	43
1997-12-31	23
1998-06-30	25
1998-12-31	33
1999-06-30	43