Quarter	US dollars
2004-12-31	2031
2005-03-31	2369
2005-06-30	1837
2005-09-30	1983
2005-12-31	2565
2006-03-31	3205
2006-06-30	2942
2006-09-30	3245
2006-12-31	7333
2007-03-31	5605
2007-06-30	5881
2007-09-30	5218
2007-12-31	5702
2008-03-31	5380
2008-06-30	4951
2008-09-30	4486
2008-12-31	4405
2009-03-31	4345
2009-06-30	4792
2009-09-30	4924
2009-12-31	9426
2010-03-31	11237
2010-06-30	8690
2010-09-30	9571
2010-12-31	10830
2011-03-31	10463
2011-06-30	10340
2011-09-30	8671
2011-12-31	10139
2012-03-31	10685
2012-06-30	10478
2012-09-30	10360
2012-12-31	10289
2013-03-31	7903
2013-06-30	8351
2013-09-30	7057
2013-12-31	6727
2014-03-31	7645
2014-06-30	7569
2014-09-30	6256
2014-12-31	5728
2015-03-31	5318
2015-06-30	6200
2015-09-30	4331
2015-12-31	4007
2016-03-31	4614
2016-06-30	4687
2016-09-30	3553
2016-12-31	3163
2017-03-31	2800
2017-06-30	2519
2017-09-30	1935
2017-12-31	2782
2018-03-31	2878
2018-06-30	2268
2018-09-30	2109
2018-12-31	1877
2019-03-31	1809
2019-06-30	1240
2019-09-30	1517
2019-12-31	2104
2020-03-31	1431
2020-06-30	1486
2020-09-30	1609
2020-12-31	1847
2021-03-31	1800
2021-06-30	1628
2021-09-30	1664
2021-12-31	1512
2022-03-31	1221
2022-06-30	1147
2022-09-30	980
2022-12-31	835
2023-03-31	821
2023-06-30	774
2023-09-30	719