Quarter	US dollars
2004-12-31	6278
2005-03-31	6484
2005-06-30	6304
2005-09-30	6976
2005-12-31	6971
2006-03-31	7377
2006-06-30	7157
2006-09-30	7402
2006-12-31	7836
2007-03-31	8035
2007-06-30	8658
2007-09-30	17183
2007-12-31	17590
2008-03-31	17307
2008-06-30	17348
2008-09-30	17645
2008-12-31	17270
2009-03-31	16112
2009-06-30	16183
2009-09-30	16994
2009-12-31	17787
2010-03-31	19747
2010-06-30	20155
2010-09-30	21460
2010-12-31	22551
2011-03-31	22634
2011-06-30	24537
2011-09-30	23454
2011-12-31	22375
2012-03-31	23777
2012-06-30	21822
2012-09-30	23342
2012-12-31	23364
2013-03-31	21698
2013-06-30	22441
2013-09-30	23656
2013-12-31	24713
2014-03-31	23486
2014-06-30	25112
2014-09-30	24200
2014-12-31	22778
2015-03-31	22438
2015-06-30	21950
2015-09-30	20100
2015-12-31	19826
2016-03-31	20313
2016-06-30	20150
2016-09-30	21846
2016-12-31	21805
2017-03-31	23457
2017-06-30	23483
2017-09-30	24117
2017-12-31	24498
2018-03-31	26204
2018-06-30	26281
2018-09-30	26662
2018-12-31	26359
2019-03-31	26876
2019-06-30	27326
2019-09-30	29440
2019-12-31	29577
2020-03-31	28382
2020-06-30	27935
2020-09-30	29124
2020-12-31	33208
2021-03-31	31640
2021-06-30	33413
2021-09-30	32662
2021-12-31	35276
2022-03-31	32084
2022-06-30	31105
2022-09-30	27532
2022-12-31	27261
2023-03-31	29084
2023-06-30	29684
2023-09-30	29446