Bi-annual	US dollars
1987-06-30	168
1987-12-31	164
1988-06-30	130
1988-12-31	85
1989-06-30	59
1989-12-31	76
1990-06-30	82
1990-12-31	41
1991-06-30	55
1991-12-31	56
1992-06-30	78
1992-12-31	77
1993-06-30	158
1993-12-31	254
1994-06-30	127
1994-12-31	228
1995-06-30	205
1995-12-31	174
1996-06-30	160
1996-12-31	161
1997-06-30	120
1997-12-31	278
1998-06-30	295
1998-12-31	225
1999-06-30	172