Quarter	US dollars
2004-12-31	6439
2005-03-31	7167
2005-06-30	7785
2005-09-30	8687
2005-12-31	8957
2006-03-31	9717
2006-06-30	11167
2006-09-30	11284
2006-12-31	12049
2007-03-31	12815
2007-06-30	14631
2007-09-30	16169
2007-12-31	18689
2008-03-31	19160
2008-06-30	19764
2008-09-30	19642
2008-12-31	17340
2009-03-31	16578
2009-06-30	16707
2009-09-30	17359
2009-12-31	16416
2010-03-31	18398
2010-06-30	21668
2010-09-30	22766
2010-12-31	24682
2011-03-31	29849
2011-06-30	30991
2011-09-30	27809
2011-12-31	29894
2012-03-31	30463
2012-06-30	34901
2012-09-30	35886
2012-12-31	37528
2013-03-31	37641
2013-06-30	40211
2013-09-30	37366
2013-12-31	36909
2014-03-31	33778
2014-06-30	36300
2014-09-30	33012
2014-12-31	33350
2015-03-31	30610
2015-06-30	27002
2015-09-30	25021
2015-12-31	23546
2016-03-31	23980
2016-06-30	22201
2016-09-30	23094
2016-12-31	17944
2017-03-31	18235
2017-06-30	19603
2017-09-30	18007
2017-12-31	16815
2018-03-31	16924
2018-06-30	15446
2018-09-30	14296
2018-12-31	12901
2019-03-31	13839
2019-06-30	14903
2019-09-30	13558
2019-12-31	12712
2020-03-31	11503
2020-06-30	11334
2020-09-30	12625
2020-12-31	13504
2021-03-31	13457
2021-06-30	12532
2021-09-30	12423
2021-12-31	10915
2022-03-31	10838
2022-06-30	10721
2022-09-30	9528
2022-12-31	10672
2023-03-31	11830
2023-06-30	11824
2023-09-30	11323