Quarter	US dollars
2004-12-31	34049
2005-03-31	52118
2005-06-30	44956
2005-09-30	47179
2005-12-31	32229
2006-03-31	36144
2006-06-30	50981
2006-09-30	54486
2006-12-31	55274
2007-03-31	48326
2007-06-30	56895
2007-09-30	57559
2007-12-31	44292
2008-03-31	52716
2008-06-30	56322
2008-09-30	46604
2008-12-31	42140
2009-03-31	50507
2009-06-30	65060
2009-09-30	60719
2009-12-31	54291
2010-03-31	45043
2010-06-30	47765
2010-09-30	52014
2010-12-31	49650
2011-03-31	45628
2011-06-30	46497
2011-09-30	43106
2011-12-31	36417
2012-03-31	45885
2012-06-30	40686
2012-09-30	37391
2012-12-31	39675
2013-03-31	32254
2013-06-30	26997
2013-09-30	33201
2013-12-31	35937
2014-03-31	37077
2014-06-30	33392
2014-09-30	35903
2014-12-31	34912
2015-03-31	37140
2015-06-30	34071
2015-09-30	30645
2015-12-31	30022
2016-03-31	29870
2016-06-30	35142
2016-09-30	32114
2016-12-31	29867
2017-03-31	29853
2017-06-30	36232
2017-09-30	38949
2017-12-31	30970
2018-03-31	37795
2018-06-30	43093
2018-09-30	40451
2018-12-31	38908
2019-03-31	48439
2019-06-30	43382
2019-09-30	41666
2019-12-31	39483
2020-03-31	38900
2020-06-30	34781
2020-09-30	23758
2020-12-31	19316
2021-03-31	26520
2021-06-30	53116
2021-09-30	62590
2021-12-31	56498
2022-03-31	57149
2022-06-30	39201
2022-09-30	38084
2022-12-31	39091
2023-03-31	45673
2023-06-30	53147
2023-09-30	52082