Quarter	US dollars
2004-12-31	33308
2005-03-31	46995
2005-06-30	38713
2005-09-30	48854
2005-12-31	40618
2006-03-31	52009
2006-06-30	50335
2006-09-30	58869
2006-12-31	68589
2007-03-31	80166
2007-06-30	75364
2007-09-30	94992
2007-12-31	82089
2008-03-31	96135
2008-06-30	65116
2008-09-30	87676
2008-12-31	50435
2009-03-31	43631
2009-06-30	56498
2009-09-30	70755
2009-12-31	61727
2010-03-31	80309
2010-06-30	72667
2010-09-30	79635
2010-12-31	77178
2011-03-31	83165
2011-06-30	77650
2011-09-30	91774
2011-12-31	62057
2012-03-31	76995
2012-06-30	80982
2012-09-30	81632
2012-12-31	63754
2013-03-31	76877
2013-06-30	78674
2013-09-30	73882
2013-12-31	60210
2014-03-31	74677
2014-06-30	67143
2014-09-30	57963
2014-12-31	50164
2015-03-31	44398
2015-06-30	46435
2015-09-30	44422
2015-12-31	35754
2016-03-31	38494
2016-06-30	37878
2016-09-30	37805
2016-12-31	29973
2017-03-31	43114
2017-06-30	83202
2017-09-30	76023
2017-12-31	72037
2018-03-31	85277
2018-06-30	78075
2018-09-30	72687
2018-12-31	59186
2019-03-31	101809
2019-06-30	133569
2019-09-30	126454
2019-12-31	97487
2020-03-31	145314
2020-06-30	130423
2020-09-30	156431
2020-12-31	178301
2021-03-31	199842
2021-06-30	137720
2021-09-30	144246
2021-12-31	118751
2022-03-31	155059
2022-06-30	133253
2022-09-30	140915
2022-12-31	156691
2023-03-31	154878
2023-06-30	158167
2023-09-30	149921