Quarter	US dollars
2004-12-31	13065
2005-03-31	15322
2005-06-30	18495
2005-09-30	21118
2005-12-31	19744
2006-03-31	22422
2006-06-30	23732
2006-09-30	25465
2006-12-31	30320
2007-03-31	33703
2007-06-30	37008
2007-09-30	39369
2007-12-31	43523
2008-03-31	49433
2008-06-30	56935
2008-09-30	53876
2008-12-31	43030
2009-03-31	43264
2009-06-30	51957
2009-09-30	60882
2009-12-31	59517
2010-03-31	65188
2010-06-30	65183
2010-09-30	79849
2010-12-31	85822
2011-03-31	84489
2011-06-30	99851
2011-09-30	84368
2011-12-31	83819
2012-03-31	86349
2012-06-30	77341
2012-09-30	78342
2012-12-31	76027
2013-03-31	80942
2013-06-30	70385
2013-09-30	79883
2013-12-31	74057
2014-03-31	78163
2014-06-30	76314
2014-09-30	75773
2014-12-31	72560
2015-03-31	67588
2015-06-30	64454
2015-09-30	53090
2015-12-31	49487
2016-03-31	54090
2016-06-30	56927
2016-09-30	16769
2016-12-31	15097
2017-03-31	16137
2017-06-30	14270
2017-09-30	15836
2017-12-31	13741
2018-03-31	15254
2018-06-30	14369
2018-09-30	15881
2018-12-31	16550
2019-03-31	18371
2019-06-30	15747
2019-09-30	21263
2019-12-31	17695
2020-03-31	14216
2020-06-30	13559
2020-09-30	11570
2020-12-31	16536
2021-03-31	16512
2021-06-30	15350
2021-09-30	15323
2021-12-31	30021
2022-03-31	23865
2022-06-30	10588
2022-09-30	28219
2022-12-31	31342
2023-03-31	32944
2023-06-30	32070
2023-09-30	16836