Quarter	US dollars
2004-12-31	58947
2005-03-31	60007
2005-06-30	41147
2005-09-30	43037
2005-12-31	44963
2006-03-31	45316
2006-06-30	47672
2006-09-30	44734
2006-12-31	51242
2007-03-31	48193
2007-06-30	49546
2007-09-30	54358
2007-12-31	50392
2008-03-31	54267
2008-06-30	54314
2008-09-30	55512
2008-12-31	51669
2009-03-31	48989
2009-06-30	53106
2009-09-30	50242
2009-12-31	48725
2010-03-31	16537
2010-06-30	15812
2010-09-30	14961
2010-12-31	17017
2011-03-31	13143
2011-06-30	13195
2011-09-30	12792
2011-12-31	12922
2012-03-31	14043
2012-06-30	15928
2012-09-30	15413
2012-12-31	17191
2013-03-31	16711
2013-06-30	16088
2013-09-30	16701
2013-12-31	15829
2014-03-31	19067
2014-06-30	16487
2014-09-30	17877
2014-12-31	17842
2015-03-31	15595
2015-06-30	15133
2015-09-30	14382
2015-12-31	13948
2016-03-31	18023
2016-06-30	16569
2016-09-30	16779
2016-12-31	16486
2017-03-31	19029
2017-06-30	20393
2017-09-30	18560
2017-12-31	19572
2018-03-31	24170
2018-06-30	24164
2018-09-30	24795
2018-12-31	23471
2019-03-31	24102
2019-06-30	24492
2019-09-30	23902
2019-12-31	23456
2020-03-31	22066
2020-06-30	26216
2020-09-30	24152
2020-12-31	24238
2021-03-31	29361
2021-06-30	28100
2021-09-30	28606
2021-12-31	28005
2022-03-31	25940
2022-06-30	25596
2022-09-30	25372
2022-12-31	21511
2023-03-31	20456
2023-06-30	19928
2023-09-30	21839