Bi-annual	US dollars
1987-06-30	85
1987-12-31	53
1988-06-30	34
1988-12-31	40
1989-06-30	96
1989-12-31	68
1990-06-30	59
1990-12-31	143
1991-06-30	135
1991-12-31	202
1992-06-30	202
1992-12-31	265
1993-06-30	270
1993-12-31	214
1994-06-30	295
1994-12-31	266
1995-06-30	210
1995-12-31	216
1996-06-30	194
1996-12-31	113
1997-06-30	143
1997-12-31	173
1998-06-30	153
1998-12-31	125
1999-06-30	99