Quarter	US dollars
2004-12-31	1628
2005-03-31	1552
2005-06-30	2045
2005-09-30	1656
2005-12-31	1478
2006-03-31	1986
2006-06-30	2303
2006-09-30	1620
2006-12-31	2389
2007-03-31	2458
2007-06-30	2436
2007-09-30	3005
2007-12-31	3795
2008-03-31	3029
2008-06-30	2856
2008-09-30	2174
2008-12-31	1872
2009-03-31	1698
2009-06-30	1942
2009-09-30	2762
2009-12-31	3662
2010-03-31	3156
2010-06-30	3911
2010-09-30	2415
2010-12-31	2940
2011-03-31	4027
2011-06-30	2749
2011-09-30	3019
2011-12-31	3089
2012-03-31	2952
2012-06-30	3487
2012-09-30	3921
2012-12-31	2977
2013-03-31	2247
2013-06-30	2449
2013-09-30	2427
2013-12-31	1975
2014-03-31	2321
2014-06-30	1686
2014-09-30	1686
2014-12-31	1614
2015-03-31	1559
2015-06-30	1395
2015-09-30	1406
2015-12-31	846
2016-03-31	916
2016-06-30	1057
2016-09-30	764
2016-12-31	693
2017-03-31	730
2017-06-30	1133
2017-09-30	1142
2017-12-31	948
2018-03-31	1057
2018-06-30	1026
2018-09-30	1677
2018-12-31	1359
2019-03-31	1161
2019-06-30	1070
2019-09-30	923
2019-12-31	910
2020-03-31	665
2020-06-30	575
2020-09-30	626
2020-12-31	651
2021-03-31	621
2021-06-30	604
2021-09-30	557
2021-12-31	575
2022-03-31	382
2022-06-30	381
2022-09-30	313
2022-12-31	328
2023-03-31	319
2023-06-30	290
2023-09-30	282