Quarter	US dollars
2004-12-31	34272
2005-03-31	33636
2005-06-30	29976
2005-09-30	32712
2005-12-31	25811
2006-03-31	36102
2006-06-30	31815
2006-09-30	31817
2006-12-31	34745
2007-03-31	32546
2007-06-30	41791
2007-09-30	36044
2007-12-31	40419
2008-03-31	42067
2008-06-30	26602
2008-09-30	29681
2008-12-31	28979
2009-03-31	20222
2009-06-30	24366
2009-09-30	29189
2009-12-31	23629
2010-03-31	30540
2010-06-30	25133
2010-09-30	26973
2010-12-31	25774
2011-03-31	31800
2011-06-30	32926
2011-09-30	29335
2011-12-31	15883
2012-03-31	14525
2012-06-30	11408
2012-09-30	12774
2012-12-31	10637
2013-03-31	9648
2013-06-30	10379
2013-09-30	11099
2013-12-31	11854
2014-03-31	11189
2014-06-30	11099
2014-09-30	11102
2014-12-31	10398
2015-03-31	11067
2015-06-30	11924
2015-09-30	11651
2015-12-31	8648
2016-03-31	10756
2016-06-30	8654
2016-09-30	6211
2016-12-31	4766
2017-03-31	8067
2017-06-30	7739
2017-09-30	7384
2017-12-31	5782
2018-03-31	6130
2018-06-30	6378
2018-09-30	6528
2018-12-31	5437
2019-03-31	6369
2019-06-30	6088
2019-09-30	6753
2019-12-31	5682
2020-03-31	8928
2020-06-30	8099
2020-09-30	8162
2020-12-31	7874
2021-03-31	9173
2021-06-30	7189
2021-09-30	7987
2021-12-31	6290
2022-03-31	7061
2022-06-30	5565
2022-09-30	6384
2022-12-31	4710
2023-03-31	6621
2023-06-30	7065
2023-09-30	6505