Bi-annual	US dollars
1987-06-30	95
1987-12-31	96
1988-06-30	101
1988-12-31	63
1989-06-30	85
1989-12-31	18
1990-06-30	31
1990-12-31	46
1991-06-30	44
1991-12-31	56
1992-06-30	51
1992-12-31	50
1993-06-30	321
1993-12-31	550
1994-06-30	185
1994-12-31	350
1995-06-30	288
1995-12-31	456
1996-06-30	493
1996-12-31	298
1997-06-30	880
1997-12-31	699
1998-06-30	1484
1998-12-31	884
1999-06-30	755