Bi-annual	US dollars
1987-06-30	0
1987-12-31	2
1988-06-30	19
1988-12-31	7
1989-06-30	5
1989-12-31	10
1990-06-30	12
1990-12-31	12
1991-06-30	11
1991-12-31	7
1992-06-30	17
1992-12-31	2
1993-06-30	50
1993-12-31	81
1994-06-30	28
1994-12-31	31
1995-06-30	54
1995-12-31	53
1996-06-30	36
1996-12-31	146
1997-06-30	168
1997-12-31	211
1998-06-30	208
1998-12-31	138
1999-06-30	448