Quarter	US dollars
1986-09-30	7598
1986-12-31	8188
1987-03-31	9097
1987-06-30	8446
1987-09-30	9773
1987-12-31	11851
1988-03-31	13421
1988-06-30	12170
1988-09-30	11978
1988-12-31	12248
1989-03-31	12684
1989-06-30	13697
1989-09-30	14539
1989-12-31	16534
1990-03-31	22412
1990-06-30	21793
1990-09-30	26144
1990-12-31	21948
1991-03-31	24063
1991-06-30	23306
1991-09-30	25427
1991-12-31	27050
1992-03-31	25993
1992-06-30	28212
1992-09-30	34005
1992-12-31	22926
1993-03-31	28819
1993-06-30	25815
1993-09-30	30657
1993-12-31	27290
1994-03-31	28395
1994-06-30	28722
1994-09-30	27360
1994-12-31	28663
1995-03-31	36271
1995-06-30	33454
1995-09-30	29278
1995-12-31	30923
1996-03-31	34467
1996-06-30	34267
1996-09-30	44340
1996-12-31	45533
1997-03-31	47313
1997-06-30	45836
1997-09-30	45840
1997-12-31	48412
1998-03-31	47665
1998-06-30	57176
1998-09-30	66099
1998-12-31	61504