Bi-annual	US dollars
1987-06-30	16
1987-12-31	25
1988-06-30	22
1988-12-31	4
1989-06-30	23
1989-12-31	15
1990-06-30	31
1990-12-31	93
1991-06-30	115
1991-12-31	172
1992-06-30	154
1992-12-31	194
1993-06-30	536
1993-12-31	433
1994-06-30	526
1994-12-31	1934
1995-06-30	2978
1995-12-31	3441
1996-06-30	3619
1996-12-31	2205
1997-06-30	1003
1997-12-31	2570
1998-06-30	2544
1998-12-31	2541
1999-06-30	3206