Bi-annual	US dollars
1987-06-30	145
1987-12-31	132
1988-06-30	162
1988-12-31	125
1989-06-30	146
1989-12-31	105
1990-06-30	112
1990-12-31	87
1991-06-30	66
1991-12-31	56
1992-06-30	84
1992-12-31	89
1993-06-30	89
1993-12-31	67
1994-06-30	134
1994-12-31	156
1995-06-30	52
1995-12-31	40
1996-06-30	31
1996-12-31	29
1997-06-30	47
1997-12-31	28
1998-06-30	38
1998-12-31	23
1999-06-30	22