Quarter	US dollars
1986-09-30	19929
1986-12-31	20351
1987-03-31	22246
1987-06-30	21834
1987-09-30	20840
1987-12-31	23201
1988-03-31	20976
1988-06-30	22292
1988-09-30	20549
1988-12-31	21190
1989-03-31	22666
1989-06-30	24240
1989-09-30	26510
1989-12-31	30119
1990-03-31	32288
1990-06-30	37470
1990-09-30	42538
1990-12-31	51529
1991-03-31	53132
1991-06-30	52412
1991-09-30	61532
1991-12-31	60739
1992-03-31	59419
1992-06-30	69901
1992-09-30	64328
1992-12-31	79213
1993-03-31	91358
1993-06-30	92172
1993-09-30	95884
1993-12-31	102070
1994-03-31	103572
1994-06-30	107220
1994-09-30	112994
1994-12-31	118745
1995-03-31	124880
1995-06-30	133281
1995-09-30	140921
1995-12-31	161104
1996-03-31	179914
1996-06-30	191360
1996-09-30	202063
1996-12-31	210482
1997-03-31	221548
1997-06-30	214100
1997-09-30	241777
1997-12-31	246486
1998-03-31	285088
1998-06-30	310855
1998-09-30	350718
1998-12-31	298644