Bi-annual	US dollars
1987-06-30	13
1987-12-31	42
1988-06-30	46
1988-12-31	34
1989-06-30	60
1989-12-31	69
1990-06-30	58
1990-12-31	56
1991-06-30	50
1991-12-31	52
1992-06-30	49
1992-12-31	86
1993-06-30	152
1993-12-31	101
1994-06-30	93
1994-12-31	91
1995-06-30	99
1995-12-31	79
1996-06-30	126
1996-12-31	159
1997-06-30	190
1997-12-31	150
1998-06-30	208
1998-12-31	220
1999-06-30	765