Quarter	US dollars
2004-12-31	4971
2005-03-31	5274
2005-06-30	5815
2005-09-30	6154
2005-12-31	7278
2006-03-31	8072
2006-06-30	8879
2006-09-30	8642
2006-12-31	9268
2007-03-31	10919
2007-06-30	13465
2007-09-30	14433
2007-12-31	15834
2008-03-31	17729
2008-06-30	18810
2008-09-30	18088
2008-12-31	16744
2009-03-31	16360
2009-06-30	16109
2009-09-30	17415
2009-12-31	16140
2010-03-31	17419
2010-06-30	21732
2010-09-30	24490
2010-12-31	25079
2011-03-31	26384
2011-06-30	28023
2011-09-30	24261
2011-12-31	24852
2012-03-31	28083
2012-06-30	27403
2012-09-30	26846
2012-12-31	26558
2013-03-31	26268
2013-06-30	29260
2013-09-30	28148
2013-12-31	29286
2014-03-31	28516
2014-06-30	29458
2014-09-30	26948
2014-12-31	27139
2015-03-31	22224
2015-06-30	21469
2015-09-30	19437
2015-12-31	16596
2016-03-31	14694
2016-06-30	12862
2016-09-30	13446
2016-12-31	10854
2017-03-31	12408
2017-06-30	12695
2017-09-30	13279
2017-12-31	13341
2018-03-31	12927
2018-06-30	11893
2018-09-30	11168
2018-12-31	9669
2019-03-31	9990
2019-06-30	10339
2019-09-30	10061
2019-12-31	11116
2020-03-31	7610
2020-06-30	8483
2020-09-30	9444
2020-12-31	10807
2021-03-31	9483
2021-06-30	7779
2021-09-30	7110
2021-12-31	9179
2022-03-31	7130
2022-06-30	7007
2022-09-30	5801
2022-12-31	7546
2023-03-31	8083
2023-06-30	7584
2023-09-30	7305