Quarter	US dollars
2004-12-31	19957
2005-03-31	19774
2005-06-30	18120
2005-09-30	18259
2005-12-31	17214
2006-03-31	8062
2006-06-30	9138
2006-09-30	8753
2006-12-31	8294
2007-03-31	8877
2007-06-30	9655
2007-09-30	9936
2007-12-31	10432
2008-03-31	11223
2008-06-30	12183
2008-09-30	10928
2008-12-31	9480
2009-03-31	8581
2009-06-30	8998
2009-09-30	9006
2009-12-31	8515
2010-03-31	8794
2010-06-30	9582
2010-09-30	9727
2010-12-31	11519
2011-03-31	11527
2011-06-30	11886
2011-09-30	10894
2011-12-31	11065
2012-03-31	10774
2012-06-30	11747
2012-09-30	11915
2012-12-31	15694
2013-03-31	15277
2013-06-30	15314
2013-09-30	15543
2013-12-31	15591
2014-03-31	10504
2014-06-30	10053
2014-09-30	10548
2014-12-31	10233
2015-03-31	10210
2015-06-30	10526
2015-09-30	9203
2015-12-31	9861
2016-03-31	10252
2016-06-30	10684
2016-09-30	9424
2016-12-31	9091
2017-03-31	9892
2017-06-30	11366
2017-09-30	11083
2017-12-31	10326
2018-03-31	9082
2018-06-30	10136
2018-09-30	9526
2018-12-31	9407
2019-03-31	10363
2019-06-30	10811
2019-09-30	10431
2019-12-31	11065
2020-03-31	11468
2020-06-30	12044
2020-09-30	12354
2020-12-31	12606
2021-03-31	13563
2021-06-30	12678
2021-09-30	13789
2021-12-31	13830
2022-03-31	13891
2022-06-30	13884
2022-09-30	14065
2022-12-31	12750
2023-03-31	12951
2023-06-30	13590
2023-09-30	14271