Quarter	US dollars
2004-12-31	24926
2005-03-31	24057
2005-06-30	25263
2005-09-30	24931
2005-12-31	24003
2006-03-31	26755
2006-06-30	30012
2006-09-30	32723
2006-12-31	31020
2007-03-31	36221
2007-06-30	33750
2007-09-30	33745
2007-12-31	30128
2008-03-31	36890
2008-06-30	33284
2008-09-30	33523
2008-12-31	25420
2009-03-31	25367
2009-06-30	26565
2009-09-30	26053
2009-12-31	24443
2010-03-31	24631
2010-06-30	21836
2010-09-30	18920
2010-12-31	22164
2011-03-31	25412
2011-06-30	27358
2011-09-30	27058
2011-12-31	25214
2012-03-31	28013
2012-06-30	27414
2012-09-30	28954
2012-12-31	30855
2013-03-31	30357
2013-06-30	24737
2013-09-30	25450
2013-12-31	27238
2014-03-31	24049
2014-06-30	25712
2014-09-30	22634
2014-12-31	31210
2015-03-31	30441
2015-06-30	34242
2015-09-30	32462
2015-12-31	33243
2016-03-31	31353
2016-06-30	27615
2016-09-30	27725
2016-12-31	29426
2017-03-31	30530
2017-06-30	29967
2017-09-30	27594
2017-12-31	32097
2018-03-31	35193
2018-06-30	38604
2018-09-30	38483
2018-12-31	38874
2019-03-31	33974
2019-06-30	35342
2019-09-30	36353
2019-12-31	36972
2020-03-31	44015
2020-06-30	45503
2020-09-30	45928
2020-12-31	52486
2021-03-31	48220
2021-06-30	55680
2021-09-30	52029
2021-12-31	57679
2022-03-31	57385
2022-06-30	56278
2022-09-30	51965
2022-12-31	58085
2023-03-31	57011
2023-06-30	60827
2023-09-30	64714