Bi-annual	US dollars
1987-06-30	61
1987-12-31	49
1988-06-30	39
1988-12-31	318
1989-06-30	312
1989-12-31	429
1990-06-30	516
1990-12-31	289
1991-06-30	363
1991-12-31	508
1992-06-30	396
1992-12-31	300
1993-06-30	377
1993-12-31	616
1994-06-30	619
1994-12-31	677
1995-06-30	655
1995-12-31	541
1996-06-30	615
1996-12-31	666
1997-06-30	474
1997-12-31	627
1998-06-30	413
1998-12-31	198
1999-06-30	84