Bi-annual	US dollars
1987-06-30	321
1987-12-31	242
1988-06-30	464
1988-12-31	468
1989-06-30	547
1989-12-31	603
1990-06-30	729
1990-12-31	413
1991-06-30	269
1991-12-31	325
1992-06-30	291
1992-12-31	374
1993-06-30	546
1993-12-31	313
1994-06-30	361
1994-12-31	127
1995-06-30	76
1995-12-31	116
1996-06-30	96
1996-12-31	92
1997-06-30	67
1997-12-31	114
1998-06-30	252
1998-12-31	180
1999-06-30	150