Bi-annual	US dollars
1987-06-30	208
1987-12-31	225
1988-06-30	153
1988-12-31	61
1989-06-30	242
1989-12-31	52
1990-06-30	51
1990-12-31	100
1991-06-30	45
1991-12-31	75
1992-06-30	204
1992-12-31	174
1993-06-30	420
1993-12-31	95
1994-06-30	170
1994-12-31	496
1995-06-30	134
1995-12-31	240
1996-06-30	224
1996-12-31	300
1997-06-30	276
1997-12-31	153
1998-06-30	155
1998-12-31	143
1999-06-30	151