Quarter	US dollars
1986-09-30	20715
1986-12-31	22507
1987-03-31	22581
1987-06-30	23650
1987-09-30	25387
1987-12-31	27948
1988-03-31	27273
1988-06-30	28720
1988-09-30	28018
1988-12-31	30630
1989-03-31	29898
1989-06-30	29901
1989-09-30	30366
1989-12-31	30745
1990-03-31	29519
1990-06-30	31438
1990-09-30	32585
1990-12-31	32987
1991-03-31	32821
1991-06-30	32603
1991-09-30	32989
1991-12-31	33717
1992-03-31	32731
1992-06-30	37175
1992-09-30	35581
1992-12-31	35227
1993-03-31	33094
1993-06-30	34610
1993-09-30	34334
1993-12-31	33583
1994-03-31	34785
1994-06-30	32323
1994-09-30	34914
1994-12-31	34483
1995-03-31	35650
1995-06-30	32913
1995-09-30	32911
1995-12-31	32490
1996-03-31	33839
1996-06-30	32820
1996-09-30	32150
1996-12-31	33104
1997-03-31	30426
1997-06-30	31409
1997-09-30	29559
1997-12-31	31880
1998-03-31	31143
1998-06-30	34803
1998-09-30	39007
1998-12-31	39261
1999-03-31	43853
1999-06-30	44680
1999-09-30	46054
1999-12-31	51301
2000-03-31	52808
2000-06-30	50725
2000-09-30	54700
2000-12-31	60829
2001-03-31	66316
2001-06-30	61291
2001-09-30	60244
2001-12-31	60090
2002-03-31	58495
2002-06-30	54393
2002-09-30	49427
2002-12-31	54762
2003-03-31	44616
2003-06-30	48290
2003-09-30	48117
2003-12-31	64285
2004-03-31	54538
2004-06-30	46951
2004-09-30	54660
2004-12-31	62504
2005-03-31	53178
2005-06-30	53093
2005-09-30	47566
2005-12-31	61623
2006-03-31	67355
2006-06-30	65018
2006-09-30	69961
2006-12-31	80687
2007-03-31	84717
2007-06-30	107163
2007-09-30	142933
2007-12-31	160080
2008-03-31	149838
2008-06-30	118365
2008-09-30	137748
2008-12-31	135650
2009-03-31	121745
2009-06-30	107236
2009-09-30	103426
2009-12-31	81367
2010-03-31	67365
2010-06-30	63992
2010-09-30	68559
2010-12-31	67464
2011-03-31	61565
2011-06-30	57434
2011-09-30	61275
2011-12-31	67295
2012-03-31	58919
2012-06-30	59104
2012-09-30	67988
2012-12-31	54126
2013-03-31	52704
2013-06-30	57042
2013-09-30	55557
2013-12-31	63969
2014-03-31	52766
2014-06-30	71005
2014-09-30	62652
2014-12-31	74737
2015-03-31	87943
2015-06-30	86046
2015-09-30	83443
2015-12-31	84575
2016-03-31	83508
2016-06-30	81317
2016-09-30	92562
2016-12-31	87402
2017-03-31	89718
2017-06-30	85278
2017-09-30	84260
2017-12-31	95732
2018-03-31	91711
2018-06-30	79759
2018-09-30	73785
2018-12-31	96852
2019-03-31	83730
2019-06-30	81243
2019-09-30	74739
2019-12-31	102363
2020-03-31	92635
2020-06-30	91804
2020-09-30	101656
2020-12-31	111219
2021-03-31	114474
2021-06-30	123679
2021-09-30	131762
2021-12-31	139253
2022-03-31	136348
2022-06-30	144959
2022-09-30	139843
2022-12-31	149091
2023-03-31	156405
2023-06-30	150884
2023-09-30	146304