Quarter	US dollars
1986-09-30	4988
1986-12-31	4902
1987-03-31	5371
1987-06-30	5781
1987-09-30	6024
1987-12-31	6785
1988-03-31	7452
1988-06-30	7212
1988-09-30	6423
1988-12-31	6899
1989-03-31	7565
1989-06-30	7942
1989-09-30	8109
1989-12-31	8185
1990-03-31	9541
1990-06-30	10381
1990-09-30	10769
1990-12-31	10547
1991-03-31	9823
1991-06-30	9305
1991-09-30	9266
1991-12-31	8270
1992-03-31	8374
1992-06-30	8612
1992-09-30	8340
1992-12-31	8143
1993-03-31	9238
1993-06-30	9130
1993-09-30	9406
1993-12-31	8845
1994-03-31	9295
1994-06-30	10107
1994-09-30	9762
1994-12-31	9516
1995-03-31	11348
1995-06-30	9874
1995-09-30	9150
1995-12-31	9180
1996-03-31	9224
1996-06-30	9299
1996-09-30	9848
1996-12-31	9251
1997-03-31	9551
1997-06-30	8770
1997-09-30	9733
1997-12-31	8953
1998-03-31	8186
1998-06-30	10369
1998-09-30	10635
1998-12-31	8649
1999-03-31	7380
1999-06-30	7607
1999-09-30	8145
1999-12-31	7835
2000-03-31	8195
2000-06-30	10392
2000-09-30	13190
2000-12-31	12341
2001-03-31	13485
2001-06-30	11981
2001-09-30	12271
2001-12-31	13538
2002-03-31	13892
2002-06-30	12704
2002-09-30	15138
2002-12-31	14212
2003-03-31	13621
2003-06-30	15471
2003-09-30	10097
2003-12-31	9316
2004-03-31	9272
2004-06-30	8327
2004-09-30	10789
2004-12-31	9242
2005-03-31	10458
2005-06-30	10350
2005-09-30	10540
2005-12-31	9803
2006-03-31	9525
2006-06-30	11110
2006-09-30	11003
2006-12-31	13337
2007-03-31	13823
2007-06-30	15471
2007-09-30	14715
2007-12-31	16417
2008-03-31	19686
2008-06-30	20292
2008-09-30	17258
2008-12-31	14363
2009-03-31	15267
2009-06-30	18004
2009-09-30	18153
2009-12-31	14904
2010-03-31	17045
2010-06-30	18209
2010-09-30	18456
2010-12-31	15273
2011-03-31	20195
2011-06-30	17848
2011-09-30	25210
2011-12-31	22654
2012-03-31	27320
2012-06-30	29869
2012-09-30	30107
2012-12-31	34267
2013-03-31	30159
2013-06-30	29551
2013-09-30	28729
2013-12-31	29455
2014-03-31	30547
2014-06-30	32776
2014-09-30	31037
2014-12-31	30856
2015-03-31	32193
2015-06-30	27838
2015-09-30	27813
2015-12-31	24782
2016-03-31	25895
2016-06-30	21940
2016-09-30	21086
2016-12-31	18893
2017-03-31	19353
2017-06-30	18624
2017-09-30	15667
2017-12-31	16652
2018-03-31	17287
2018-06-30	16674
2018-09-30	14997
2018-12-31	18010
2019-03-31	18750
2019-06-30	16323
2019-09-30	14783
2019-12-31	13186
2020-03-31	17383
2020-06-30	15213
2020-09-30	16223
2020-12-31	13838
2021-03-31	13912
2021-06-30	13952
2021-09-30	16860
2021-12-31	9889
2022-03-31	14018
2022-06-30	13180
2022-09-30	13015
2022-12-31	9672
2023-03-31	11440
2023-06-30	13113
2023-09-30	13046