Quarter	US dollars
1986-09-30	2606
1986-12-31	2671
1987-03-31	2781
1987-06-30	3020
1987-09-30	3013
1987-12-31	2931
1988-03-31	2581
1988-06-30	3002
1988-09-30	2922
1988-12-31	2536
1989-03-31	2718
1989-06-30	2941
1989-09-30	2800
1989-12-31	2747
1990-03-31	3211
1990-06-30	3286
1990-09-30	3532
1990-12-31	3669
1991-03-31	1958
1991-06-30	1856
1991-09-30	1456
1991-12-31	1499
1992-03-31	2285
1992-06-30	2940
1992-09-30	3173
1992-12-31	3240
1993-03-31	3095
1993-06-30	2837
1993-09-30	2873
1993-12-31	3090
1994-03-31	3124
1994-06-30	3013
1994-09-30	3060
1994-12-31	3140
1995-03-31	3194
1995-06-30	2800
1995-09-30	3062
1995-12-31	3059
1996-03-31	2863
1996-06-30	2746
1996-09-30	2692
1996-12-31	2543
1997-03-31	2608
1997-06-30	2973
1997-09-30	3073
1997-12-31	3171
1998-03-31	3451
1998-06-30	3812
1998-09-30	3850
1998-12-31	3375
1999-03-31	3996
1999-06-30	3593
1999-09-30	3234
1999-12-31	2862
2000-03-31	3153
2000-06-30	3196
2000-09-30	3541
2000-12-31	3153
2001-03-31	2956
2001-06-30	3396
2001-09-30	3517
2001-12-31	3109
2002-03-31	2923
2002-06-30	3261
2002-09-30	3307
2002-12-31	3435
2003-03-31	3747
2003-06-30	3277
2003-09-30	3255
2003-12-31	3463
2004-03-31	3473
2004-06-30	3467
2004-09-30	3810
2004-12-31	3626
2005-03-31	3435
2005-06-30	3354
2005-09-30	3378
2005-12-31	3961
2006-03-31	3778
2006-06-30	3975
2006-09-30	4403
2006-12-31	4736
2007-03-31	5234
2007-06-30	5521
2007-09-30	5960
2007-12-31	7209
2008-03-31	6905
2008-06-30	6455
2008-09-30	6754
2008-12-31	5494
2009-03-31	4925
2009-06-30	4478
2009-09-30	4134
2009-12-31	4016
2010-03-31	4362
2010-06-30	7248
2010-09-30	3500
2010-12-31	5283
2011-03-31	5728
2011-06-30	4984
2011-09-30	4672
2011-12-31	4146
2012-03-31	3513
2012-06-30	3835
2012-09-30	3419
2012-12-31	2531
2013-03-31	2977
2013-06-30	2680
2013-09-30	2635
2013-12-31	2869
2014-03-31	3242
2014-06-30	2868
2014-09-30	3047
2014-12-31	3400
2015-03-31	3285
2015-06-30	3348
2015-09-30	3733
2015-12-31	3393
2016-03-31	3404
2016-06-30	2878
2016-09-30	3366
2016-12-31	4314
2017-03-31	4210
2017-06-30	3338
2017-09-30	3911
2017-12-31	4474
2018-03-31	3597
2018-06-30	2913
2018-09-30	4147
2018-12-31	3368
2019-03-31	3152
2019-06-30	3825
2019-09-30	3461
2019-12-31	3607
2020-03-31	3339
2020-06-30	3666
2020-09-30	4126
2020-12-31	4193
2021-03-31	4507
2021-06-30	4540
2021-09-30	4811
2021-12-31	4465
2022-03-31	5074
2022-06-30	5260
2022-09-30	5406
2022-12-31	4607
2023-03-31	4268
2023-06-30	3849
2023-09-30	3482