Quarter	US dollars
2004-12-31	1851
2005-03-31	2183
2005-06-30	1717
2005-09-30	1877
2005-12-31	2444
2006-03-31	3080
2006-06-30	2804
2006-09-30	2898
2006-12-31	6364
2007-03-31	4403
2007-06-30	3916
2007-09-30	4568
2007-12-31	4458
2008-03-31	4504
2008-06-30	4259
2008-09-30	3905
2008-12-31	3779
2009-03-31	3862
2009-06-30	4275
2009-09-30	4408
2009-12-31	8859
2010-03-31	10638
2010-06-30	8216
2010-09-30	9316
2010-12-31	10692
2011-03-31	10344
2011-06-30	10224
2011-09-30	8567
2011-12-31	9972
2012-03-31	10345
2012-06-30	10450
2012-09-30	10339
2012-12-31	10181
2013-03-31	7808
2013-06-30	8257
2013-09-30	7031
2013-12-31	6472
2014-03-31	7611
2014-06-30	7526
2014-09-30	6216
2014-12-31	5711
2015-03-31	5280
2015-06-30	6150
2015-09-30	4297
2015-12-31	3912
2016-03-31	4565
2016-06-30	4628
2016-09-30	3471
2016-12-31	3121
2017-03-31	2795
2017-06-30	2327
2017-09-30	1747
2017-12-31	1778
2018-03-31	1828
2018-06-30	1632
2018-09-30	1626
2018-12-31	1447
2019-03-31	1316
2019-06-30	918
2019-09-30	912
2019-12-31	1446
2020-03-31	1055
2020-06-30	1114
2020-09-30	1217
2020-12-31	1422
2021-03-31	1275
2021-06-30	1224
2021-09-30	1189
2021-12-31	1077
2022-03-31	882
2022-06-30	835
2022-09-30	680
2022-12-31	690
2023-03-31	672
2023-06-30	624
2023-09-30	572