Quarter	US dollars
1986-09-30	13633
1986-12-31	14096
1987-03-31	15345
1987-06-30	14843
1987-09-30	14390
1987-12-31	15458
1988-03-31	15458
1988-06-30	13401
1988-09-30	13034
1988-12-31	13490
1989-03-31	12684
1989-06-30	12726
1989-09-30	12961
1989-12-31	12271
1990-03-31	12555
1990-06-30	13279
1990-09-30	14467
1990-12-31	15224
1991-03-31	15621
1991-06-30	15079
1991-09-30	16297
1991-12-31	16334
1992-03-31	16265
1992-06-30	18786
1992-09-30	20015
1992-12-31	18686
1993-03-31	18925
1993-06-30	18768
1993-09-30	19463
1993-12-31	20596
1994-03-31	21916
1994-06-30	24153
1994-09-30	23460
1994-12-31	24102
1995-03-31	22516
1995-06-30	25183
1995-09-30	26124
1995-12-31	26367
1996-03-31	29511
1996-06-30	32675
1996-09-30	35396
1996-12-31	36799
1997-03-31	39558
1997-06-30	43645
1997-09-30	43927
1997-12-31	39022
1998-03-31	34476
1998-06-30	36726
1998-09-30	32147
1998-12-31	32433