Quarter	US dollars
2004-12-31	2194
2005-03-31	1739
2005-06-30	792
2005-09-30	1330
2005-12-31	1255
2006-03-31	1542
2006-06-30	1725
2006-09-30	2079
2006-12-31	2141
2007-03-31	1855
2007-06-30	2287
2007-09-30	2779
2007-12-31	2578
2008-03-31	2902
2008-06-30	2836
2008-09-30	3210
2008-12-31	2961
2009-03-31	3204
2009-06-30	4229
2009-09-30	2970
2009-12-31	3614
2010-03-31	3795
2010-06-30	3199
2010-09-30	4744
2010-12-31	3795
2011-03-31	2744
2011-06-30	3455
2011-09-30	3396
2011-12-31	3751
2012-03-31	3883
2012-06-30	4472
2012-09-30	3013
2012-12-31	5248
2013-03-31	5101
2013-06-30	5216
2013-09-30	5974
2013-12-31	5398
2014-03-31	4525
2014-06-30	6056
2014-09-30	5100
2014-12-31	5007
2015-03-31	4386
2015-06-30	4061
2015-09-30	4006
2015-12-31	3943
2016-03-31	3659
2016-06-30	3825
2016-09-30	4840
2016-12-31	4563
2017-03-31	4292
2017-06-30	6459
2017-09-30	6877
2017-12-31	7113
2018-03-31	6537
2018-06-30	6924
2018-09-30	6959
2018-12-31	6911
2019-03-31	6258
2019-06-30	6155
2019-09-30	6069
2019-12-31	6211
2020-03-31	6710
2020-06-30	5325
2020-09-30	4977
2020-12-31	5561
2021-03-31	5462
2021-06-30	6596
2021-09-30	6053
2021-12-31	6911
2022-03-31	6031
2022-06-30	6791
2022-09-30	6777
2022-12-31	6310
2023-03-31	6243
2023-06-30	6222
2023-09-30	6167