Bi-annual	US dollars
1987-06-30	95
1987-12-31	94
1988-06-30	92
1988-12-31	81
1989-06-30	88
1989-12-31	110
1990-06-30	136
1990-12-31	272
1991-06-30	389
1991-12-31	459
1992-06-30	333
1992-12-31	880
1993-06-30	762
1993-12-31	706
1994-06-30	525
1994-12-31	2151
1995-06-30	833
1995-12-31	262
1996-06-30	239
1996-12-31	296
1997-06-30	155
1997-12-31	262
1998-06-30	357
1998-12-31	359
1999-06-30	1405