Quarter	US dollars
2004-12-31	8307
2005-03-31	9185
2005-06-30	9721
2005-09-30	10560
2005-12-31	10049
2006-03-31	11260
2006-06-30	13643
2006-09-30	13264
2006-12-31	13519
2007-03-31	15367
2007-06-30	16796
2007-09-30	16454
2007-12-31	14932
2008-03-31	14203
2008-06-30	11525
2008-09-30	11085
2008-12-31	5518
2009-03-31	5808
2009-06-30	4944
2009-09-30	4620
2009-12-31	4760
2010-03-31	4864
2010-06-30	6314
2010-09-30	8243
2010-12-31	8925
2011-03-31	8725
2011-06-30	9749
2011-09-30	10963
2011-12-31	12571
2012-03-31	12825
2012-06-30	13038
2012-09-30	13819
2012-12-31	15339
2013-03-31	14631
2013-06-30	15091
2013-09-30	14570
2013-12-31	15758
2014-03-31	15144
2014-06-30	15890
2014-09-30	15675
2014-12-31	14832
2015-03-31	15186
2015-06-30	15410
2015-09-30	14715
2015-12-31	14400
2016-03-31	14686
2016-06-30	14797
2016-09-30	14416
2016-12-31	14634
2017-03-31	14758
2017-06-30	16579
2017-09-30	17393
2017-12-31	17113
2018-03-31	17659
2018-06-30	17505
2018-09-30	16831
2018-12-31	17178
2019-03-31	18324
2019-06-30	20782
2019-09-30	18172
2019-12-31	18419
2020-03-31	14869
2020-06-30	17682
2020-09-30	20031
2020-12-31	21174
2021-03-31	20068
2021-06-30	20454
2021-09-30	19513
2021-12-31	19372
2022-03-31	18481
2022-06-30	18147
2022-09-30	18890
2022-12-31	18234
2023-03-31	17457
2023-06-30	17950
2023-09-30	17592