Quarter	US dollars
1986-09-30	16575
1986-12-31	18533
1987-03-31	20104
1987-06-30	20955
1987-09-30	19072
1987-12-31	21795
1988-03-31	21756
1988-06-30	23159
1988-09-30	22305
1988-12-31	24281
1989-03-31	24087
1989-06-30	23525
1989-09-30	25687
1989-12-31	27149
1990-03-31	27307
1990-06-30	28395
1990-09-30	29131
1990-12-31	32480
1991-03-31	32178
1991-06-30	27990
1991-09-30	27941
1991-12-31	29425
1992-03-31	28591
1992-06-30	30741
1992-09-30	36433
1992-12-31	31690
1993-03-31	35436
1993-06-30	34751
1993-09-30	38381
1993-12-31	39469
1994-03-31	44191
1994-06-30	43502
1994-09-30	46736
1994-12-31	48998
1995-03-31	52940
1995-06-30	50622
1995-09-30	44554
1995-12-31	44269
1996-03-31	43317
1996-06-30	40036
1996-09-30	42024
1996-12-31	41371
1997-03-31	43386
1997-06-30	37901
1997-09-30	42174
1997-12-31	39422
1998-03-31	44436
1998-06-30	42774
1998-09-30	41145
1998-12-31	40760
1999-03-31	39211
1999-06-30	38731
1999-09-30	38277
1999-12-31	38451
2000-03-31	41317
2000-06-30	42487
2000-09-30	39129
2000-12-31	44165
2001-03-31	45382
2001-06-30	37497
2001-09-30	42825
2001-12-31	40207
2002-03-31	39792
2002-06-30	46226
2002-09-30	50152
2002-12-31	50869
2003-03-31	54294
2003-06-30	55770
2003-09-30	57348
2003-12-31	77636
2004-03-31	85395
2004-06-30	78721
2004-09-30	69092
2004-12-31	87331
2005-03-31	83594
2005-06-30	77065
2005-09-30	90544
2005-12-31	72623
2006-03-31	80510
2006-06-30	91488
2006-09-30	90470
2006-12-31	88363
2007-03-31	109929
2007-06-30	106813
2007-09-30	108883
2007-12-31	122854
2008-03-31	140215
2008-06-30	146938
2008-09-30	139897
2008-12-31	161758
2009-03-31	104951
2009-06-30	96196
2009-09-30	93098
2009-12-31	92631
2010-03-31	84736
2010-06-30	66324
2010-09-30	71253
2010-12-31	74130
2011-03-31	81111
2011-06-30	80958
2011-09-30	89746
2011-12-31	98304
2012-03-31	92859
2012-06-30	99803
2012-09-30	113973
2012-12-31	121458
2013-03-31	109756
2013-06-30	119787
2013-09-30	108445
2013-12-31	153135
2014-03-31	120467
2014-06-30	128752
2014-09-30	124941
2014-12-31	121020
2015-03-31	116690
2015-06-30	115691
2015-09-30	118257
2015-12-31	98627
2016-03-31	95761
2016-06-30	101056
2016-09-30	104520
2016-12-31	98935
2017-03-31	104046
2017-06-30	109895
2017-09-30	121991
2017-12-31	109328
2018-03-31	112854
2018-06-30	105709
2018-09-30	115276
2018-12-31	109451
2019-03-31	105959
2019-06-30	107146
2019-09-30	104943
2019-12-31	103787
2020-03-31	112854
2020-06-30	107745
2020-09-30	114274
2020-12-31	127453
2021-03-31	110918
2021-06-30	108282
2021-09-30	108025
2021-12-31	115310
2022-03-31	96908
2022-06-30	85073
2022-09-30	82520
2022-12-31	89548
2023-03-31	83986
2023-06-30	85538
2023-09-30	80726