Bi-annual	US dollars
1987-06-30	21
1987-12-31	38
1988-06-30	43
1988-12-31	52
1989-06-30	20
1989-12-31	23
1990-06-30	37
1990-12-31	10
1991-06-30	29
1991-12-31	19
1992-06-30	49
1992-12-31	8
1993-06-30	20
1993-12-31	180
1994-06-30	160
1994-12-31	84
1995-06-30	118
1995-12-31	126
1996-06-30	179
1996-12-31	223
1997-06-30	308
1997-12-31	327
1998-06-30	340
1998-12-31	388
1999-06-30	61