Quarter	US dollars
2004-12-31	2790
2005-03-31	2977
2005-06-30	2461
2008-03-31	11200
2008-06-30	8074
2008-09-30	8928
2008-12-31	6573
2009-03-31	6519
2009-06-30	7719
2009-09-30	6723
2009-12-31	6865
2010-03-31	9478
2010-06-30	9255
2010-09-30	11459
2010-12-31	14014
2011-03-31	13709
2011-06-30	11727
2011-09-30	13747
2011-12-31	11171
2012-03-31	9549
2012-06-30	9576
2012-09-30	8979
2012-12-31	8931
2013-03-31	7730
2013-06-30	6520
2013-09-30	8903
2013-12-31	8938
2014-03-31	11691
2014-06-30	10800
2014-09-30	12371
2014-12-31	11158
2015-03-31	11870
2015-06-30	12086
2015-09-30	11809
2015-12-31	10455
2016-03-31	14138
2016-06-30	14655
2016-09-30	17683
2016-12-31	14519
2017-03-31	14667
2017-06-30	20159
2017-09-30	19853
2017-12-31	21438
2018-03-31	22437
2018-06-30	21254
2018-09-30	19036
2018-12-31	18958
2019-03-31	19101
2019-06-30	17767
2019-09-30	16479
2019-12-31	17461
2020-03-31	18093
2020-06-30	17358
2020-09-30	15200
2020-12-31	18421
2021-03-31	16088
2021-06-30	18216
2021-09-30	17231
2021-12-31	17371
2022-03-31	18211
2022-06-30	20969
2022-09-30	19443
2022-12-31	20434
2023-03-31	17990
2023-06-30	20282
2023-09-30	20882