Bi-annual	US dollars
1987-06-30	92
1987-12-31	40
1988-06-30	67
1988-12-31	89
1989-06-30	175
1989-12-31	11
1990-06-30	9
1990-12-31	21
1991-06-30	120
1991-12-31	82
1992-06-30	59
1992-12-31	67
1993-06-30	36
1993-12-31	89
1994-06-30	66
1994-12-31	213
1995-06-30	65
1995-12-31	122
1996-06-30	214
1996-12-31	169
1997-06-30	103
1997-12-31	299
1998-06-30	745
1998-12-31	273
1999-06-30	143