Quarter	US dollars
2004-12-31	16146
2005-03-31	15339
2005-06-30	16204
2005-09-30	17937
2005-12-31	16605
2006-03-31	15675
2006-06-30	17076
2006-09-30	15286
2006-12-31	16993
2007-03-31	18079
2007-06-30	18519
2007-09-30	20187
2007-12-31	20196
2008-03-31	27449
2008-06-30	30526
2008-09-30	26170
2008-12-31	21952
2009-03-31	24249
2009-06-30	25884
2009-09-30	26264
2009-12-31	25722
2010-03-31	25012
2010-06-30	22243
2010-09-30	25273
2010-12-31	24340
2011-03-31	26608
2011-06-30	25439
2011-09-30	23404
2011-12-31	20940
2012-03-31	19644
2012-06-30	17851
2012-09-30	17502
2012-12-31	17337
2013-03-31	17092
2013-06-30	15402
2013-09-30	14578
2013-12-31	15940
2014-03-31	15819
2014-06-30	14551
2014-09-30	12216
2014-12-31	11620
2015-03-31	10056
2015-06-30	10291
2015-09-30	10158
2015-12-31	9309
2016-03-31	8880
2016-06-30	4496
2016-09-30	3838
2016-12-31	1892
2017-03-31	2007
2017-06-30	2828
2017-09-30	1786
2017-12-31	1362
2018-03-31	2501
2018-06-30	2891
2018-09-30	1865
2018-12-31	1313
2019-03-31	1667
2019-06-30	2048
2019-09-30	1939
2019-12-31	2569
2020-03-31	2765
2020-06-30	2614
2020-09-30	1899
2020-12-31	1130
2021-03-31	1082
2021-06-30	735
2021-09-30	1157
2021-12-31	1046
2022-03-31	919
2022-06-30	1073
2022-09-30	1048
2022-12-31	1390
2023-03-31	1138
2023-06-30	2242
2023-09-30	2176