Quarter	US dollars
2004-12-31	16619
2005-03-31	17932
2005-06-30	12487
2005-09-30	20348
2005-12-31	19621
2006-03-31	22137
2006-06-30	22981
2006-09-30	23636
2006-12-31	27735
2007-03-31	33071
2007-06-30	36101
2007-09-30	40609
2007-12-31	47105
2008-03-31	52323
2008-06-30	53657
2008-09-30	56516
2008-12-31	49672
2009-03-31	49287
2009-06-30	51486
2009-09-30	57220
2009-12-31	58772
2010-03-31	64752
2010-06-30	78455
2010-09-30	83029
2010-12-31	84185
2011-03-31	87767
2011-06-30	88483
2011-09-30	86512
2011-12-31	82082
2012-03-31	84966
2012-06-30	85082
2012-09-30	83784
2012-12-31	84264
2013-03-31	88326
2013-06-30	81777
2013-09-30	80636
2013-12-31	79729
2014-03-31	80959
2014-06-30	78904
2014-09-30	78398
2014-12-31	74990
2015-03-31	77717
2015-06-30	72103
2015-09-30	68939
2015-12-31	65642
2016-03-31	68313
2016-06-30	65047
2016-09-30	69708
2016-12-31	58500
2017-03-31	62594
2017-06-30	67240
2017-09-30	67057
2017-12-31	66930
2018-03-31	71894
2018-06-30	69806
2018-09-30	66523
2018-12-31	69359
2019-03-31	74694
2019-06-30	73922
2019-09-30	69826
2019-12-31	64870
2020-03-31	69663
2020-06-30	65540
2020-09-30	65430
2020-12-31	67967
2021-03-31	72592
2021-06-30	73912
2021-09-30	75852
2021-12-31	82681
2022-03-31	76937
2022-06-30	80062
2022-09-30	79742
2022-12-31	80079
2023-03-31	82081
2023-06-30	85858
2023-09-30	89639