Quarter	US dollars
1986-09-30	39824
1986-12-31	40526
1987-03-31	40353
1987-06-30	40240
1987-09-30	39512
1987-12-31	39242
1988-03-31	38499
1988-06-30	37550
1988-09-30	35749
1988-12-31	35244
1989-03-31	34489
1989-06-30	34239
1989-09-30	33358
1989-12-31	31880
1990-03-31	28683
1990-06-30	26019
1990-09-30	26079
1990-12-31	27161
1991-03-31	27222
1991-06-30	28403
1991-09-30	28243
1991-12-31	28960
1992-03-31	29748
1992-06-30	27974
1992-09-30	27982
1992-12-31	26988
1993-03-31	28004
1993-06-30	27804
1993-09-30	27079
1993-12-31	29533
1994-03-31	28433
1994-06-30	29165
1994-09-30	30613
1994-12-31	28885
1995-03-31	25344
1995-06-30	24931
1995-09-30	24864
1995-12-31	24381
1996-03-31	24347
1996-06-30	24236
1996-09-30	26329
1996-12-31	26522
1997-03-31	29175
1997-06-30	29954
1997-09-30	32542
1997-12-31	29857
1998-03-31	32494
1998-06-30	29812
1998-09-30	29041
1998-12-31	28911