Quarter	US dollars
1986-09-30	5532
1986-12-31	5523
1987-03-31	5849
1987-06-30	8706
1987-09-30	9277
1987-12-31	8857
1988-03-31	8335
1988-06-30	8266
1988-09-30	6638
1988-12-31	7424
1989-03-31	6722
1989-06-30	5169
1989-09-30	5905
1989-12-31	6270
1990-03-31	6260
1990-06-30	7192
1990-09-30	8515
1990-12-31	9123
1991-03-31	8479
1991-06-30	9173
1991-09-30	9598
1991-12-31	9184
1992-03-31	8566
1992-06-30	9272
1992-09-30	10286
1992-12-31	11006
1993-03-31	10056
1993-06-30	9805
1993-09-30	8791
1993-12-31	10217
1994-03-31	11359
1994-06-30	8472
1994-09-30	8628
1994-12-31	11390
1995-03-31	10632
1995-06-30	14092
1995-09-30	16972
1995-12-31	18843
1996-03-31	19280
1996-06-30	19330
1996-09-30	19217
1996-12-31	17632
1997-03-31	20955
1997-06-30	18551
1997-09-30	19238
1997-12-31	15758
1998-03-31	22623
1998-06-30	20304
1998-09-30	20304
1998-12-31	18853