Quarter	US dollars
2004-12-31	5065
2005-03-31	5579
2005-06-30	5412
2005-09-30	5991
2005-12-31	15252
2006-03-31	16070
2006-06-30	18451
2006-09-30	18921
2006-12-31	18453
2007-03-31	18115
2007-06-30	18814
2007-09-30	19873
2007-12-31	20158
2008-03-31	22638
2008-06-30	24803
2008-09-30	20924
2008-12-31	18814
2009-03-31	17237
2009-06-30	17403
2009-09-30	16709
2009-12-31	16976
2010-03-31	18411
2010-06-30	18937
2010-09-30	19497
2010-12-31	18258
2011-03-31	19893
2011-06-30	19759
2011-09-30	24035
2011-12-31	21410
2012-03-31	22835
2012-06-30	21885
2012-09-30	22890
2012-12-31	22962
2013-03-31	22146
2013-06-30	20392
2013-09-30	22090
2013-12-31	19229
2014-03-31	20543
2014-06-30	22442
2014-09-30	23530
2014-12-31	19366
2015-03-31	18923
2015-06-30	16644
2015-09-30	14359
2015-12-31	15016
2016-03-31	14427
2016-06-30	12976
2016-09-30	12527
2016-12-31	9852
2017-03-31	10567
2017-06-30	9578
2017-09-30	9513
2017-12-31	10572
2018-03-31	11370
2018-06-30	10935
2018-09-30	12036
2018-12-31	12732
2019-03-31	12008
2019-06-30	14476
2019-09-30	13906
2019-12-31	13569
2020-03-31	15804
2020-06-30	12485
2020-09-30	12600
2020-12-31	14198
2021-03-31	13273
2021-06-30	13761
2021-09-30	13208
2021-12-31	18486
2022-03-31	14620
2022-06-30	14402
2022-09-30	15212
2022-12-31	15391
2023-03-31	16706
2023-06-30	18017
2023-09-30	13549