Quarter	US dollars
1986-09-30	13605
1986-12-31	13085
1987-03-31	14280
1987-06-30	15961
1987-09-30	17342
1987-12-31	18296
1988-03-31	18549
1988-06-30	19506
1988-09-30	22066
1988-12-31	22996
1989-03-31	24077
1989-06-30	23969
1989-09-30	26855
1989-12-31	28934
1990-03-31	30152
1990-06-30	30420
1990-09-30	34166
1990-12-31	34169
1991-03-31	28671
1991-06-30	29102
1991-09-30	31753
1991-12-31	33125
1992-03-31	33781
1992-06-30	35701
1992-09-30	37991
1992-12-31	33329
1993-03-31	33096
1993-06-30	33320
1993-09-30	34553
1993-12-31	31825
1994-03-31	33745
1994-06-30	33286
1994-09-30	39072
1994-12-31	40293
1995-03-31	42303
1995-06-30	40776
1995-09-30	44589
1995-12-31	46969
1996-03-31	49842
1996-06-30	52194
1996-09-30	55709
1996-12-31	56899
1997-03-31	55404
1997-06-30	56137
1997-09-30	168930
1997-12-31	187034
1998-03-31	189102
1998-06-30	196227
1998-09-30	196259
1998-12-31	193825