Quarter	US dollars
2004-12-31	1282
2005-03-31	3970
2005-06-30	4142
2005-09-30	6060
2005-12-31	5606
2006-03-31	6288
2006-06-30	5480
2006-09-30	4713
2006-12-31	5303
2007-03-31	7557
2007-06-30	5752
2007-09-30	5998
2007-12-31	8300
2008-03-31	7558
2008-06-30	9318
2008-09-30	7847
2008-12-31	6790
2009-03-31	5975
2009-06-30	6381
2009-09-30	5831
2009-12-31	6005
2010-03-31	6349
2010-06-30	8521
2010-09-30	10320
2010-12-31	8895
2011-03-31	3841
2011-06-30	4692
2011-09-30	4359
2011-12-31	3601
2012-03-31	3295
2012-06-30	3056
2012-09-30	4016
2012-12-31	4965
2013-03-31	4957
2013-06-30	5052
2013-09-30	4050
2013-12-31	3782
2014-03-31	5280
2014-06-30	4023
2014-09-30	4064
2014-12-31	3557
2015-03-31	3370
2015-06-30	2915
2015-09-30	2804
2015-12-31	2848
2016-03-31	2837
2016-06-30	2490
2016-09-30	2329
2016-12-31	2051
2017-03-31	2105
2017-06-30	2847
2017-09-30	2493
2017-12-31	2690
2018-03-31	2766
2018-06-30	2688
2018-09-30	3307
2018-12-31	2104
2019-03-31	2826
2019-06-30	2725
2019-09-30	2549
2019-12-31	2098
2020-03-31	1688
2020-06-30	1567
2020-09-30	1339
2020-12-31	1182
2021-03-31	1330
2021-06-30	2345
2021-09-30	2028
2021-12-31	1821
2022-03-31	1814
2022-06-30	1480
2022-09-30	1729
2022-12-31	1665
2023-03-31	1887
2023-06-30	2009
2023-09-30	1915