Quarter	US dollars
1986-09-30	9582
1986-12-31	10347
1987-03-31	13101
1987-06-30	13335
1987-09-30	13325
1987-12-31	15883
1988-03-31	16781
1988-06-30	15299
1988-09-30	17250
1988-12-31	18750
1989-03-31	19864
1989-06-30	20385
1989-09-30	22795
1989-12-31	27393
1990-03-31	33259
1990-06-30	35064
1990-09-30	38202
1990-12-31	41073
1991-03-31	38905
1991-06-30	37794
1991-09-30	39831
1991-12-31	38927
1992-03-31	37653
1992-06-30	38832
1992-09-30	41179
1992-12-31	36666
1993-03-31	41400
1993-06-30	36910
1993-09-30	39356
1993-12-31	36887
1994-03-31	37602
1994-06-30	38149
1994-09-30	39036
1994-12-31	34863
1995-03-31	39782
1995-06-30	40315
1995-09-30	33970
1995-12-31	32442
1996-03-31	32442
1996-06-30	29232
1996-09-30	29390
1996-12-31	27063
1997-03-31	24408
1997-06-30	21667
1997-09-30	19926
1997-12-31	20534
1998-03-31	27889
1998-06-30	30114
1998-09-30	33644
1998-12-31	38639