Quarter	US dollars
1997-09-30	1461
1997-12-31	1454
1998-03-31	1385
1998-06-30	1412
1998-09-30	1307
1998-12-31	1029
1999-03-31	862
1999-06-30	816
1999-09-30	829
1999-12-31	5309
2000-03-31	4884
2000-06-30	5971
2000-09-30	9545
2000-12-31	10286
2001-03-31	7005
2001-06-30	7017
2001-09-30	7433
2001-12-31	6698
2002-03-31	4529
2002-06-30	5246
2002-09-30	5154
2002-12-31	5128
2003-03-31	5139
2003-06-30	4960
2003-09-30	6606
2003-12-31	5428
2004-03-31	5527
2004-06-30	5065
2004-09-30	4797
2004-12-31	5691
2005-03-31	4827
2005-06-30	4320
2005-09-30	4150
2005-12-31	4039
2006-03-31	3888
2006-06-30	3598
2006-09-30	3533
2006-12-31	4063
2007-03-31	4207
2007-06-30	3772
2007-09-30	4310
2007-12-31	4402
2008-03-31	7053
2008-06-30	7453
2008-09-30	7180
2008-12-31	5090
2009-03-31	1668
2009-06-30	1436
2009-09-30	948
2009-12-31	1098
2010-03-31	4500
2010-06-30	2981
2010-09-30	3645
2010-12-31	4711
2011-03-31	4905
2011-06-30	5450
2011-09-30	5638
2011-12-31	6683
2012-03-31	5204
2012-06-30	7132
2012-09-30	5607
2012-12-31	6806
2013-03-31	7083
2013-06-30	5456
2013-09-30	4774
2013-12-31	4017
2014-03-31	5822
2014-06-30	3981
2014-09-30	4676
2014-12-31	4927
2015-03-31	6696
2015-06-30	4687
2015-09-30	9013
2015-12-31	9433
2016-03-31	7663
2016-06-30	8777
2016-09-30	12894
2016-12-31	11074
2017-03-31	8457
2017-06-30	5500
2017-09-30	7532
2017-12-31	10824
2018-03-31	8944
2018-06-30	12046
2018-09-30	11549
2018-12-31	9645
2019-03-31	7564
2019-06-30	14087
2019-09-30	9623
2019-12-31	9986
2020-03-31	8874
2020-06-30	11823
2020-09-30	9693
2020-12-31	7461
2021-03-31	13651
2021-06-30	13139
2021-09-30	10560
2021-12-31	9431
2022-03-31	11245
2022-06-30	7511
2022-09-30	6321
2022-12-31	10968
2023-03-31	11582
2023-06-30	8945
2023-09-30	10185
2023-12-31	11018