Quarter	US dollars
1986-09-30	12358
1986-12-31	12376
1987-03-31	15072
1987-06-30	16121
1987-09-30	15740
1987-12-31	19507
1988-03-31	22226
1988-06-30	21851
1988-09-30	22614
1988-12-31	24893
1989-03-31	25744
1989-06-30	27232
1989-09-30	29513
1989-12-31	32212
1990-03-31	36261
1990-06-30	38649
1990-09-30	43755
1990-12-31	44341
1991-03-31	40757
1991-06-30	40274
1991-09-30	44054
1991-12-31	44613
1992-03-31	43511
1992-06-30	45187
1992-09-30	51180
1992-12-31	43792
1993-03-31	44726
1993-06-30	43051
1993-09-30	44900
1993-12-31	42847
1994-03-31	42626
1994-06-30	42261
1994-09-30	41824
1994-12-31	37781
1995-03-31	43536
1995-06-30	45466
1995-09-30	39714
1995-12-31	38065
1996-03-31	36660
1996-06-30	35237
1996-09-30	34377
1996-12-31	31113
1997-03-31	26853
1997-06-30	24479
1997-09-30	25039
1997-12-31	24948
1998-03-31	25671
1998-06-30	31841
1998-09-30	35662
1998-12-31	35596