Quarter	US dollars
2004-12-31	61613
2005-03-31	62652
2005-06-30	44436
2005-09-30	46511
2005-12-31	48489
2006-03-31	48613
2006-06-30	50860
2006-09-30	47708
2006-12-31	54778
2007-03-31	51137
2007-06-30	52582
2007-09-30	57950
2007-12-31	53338
2008-03-31	56459
2008-06-30	57323
2008-09-30	58505
2008-12-31	53847
2009-03-31	50189
2009-06-30	54501
2009-09-30	51715
2009-12-31	50083
2010-03-31	17741
2010-06-30	16523
2010-09-30	15281
2010-12-31	17330
2011-03-31	13135
2011-06-30	13283
2011-09-30	13155
2011-12-31	14035
2012-03-31	16708
2012-06-30	18044
2012-09-30	17105
2012-12-31	17238
2013-03-31	17593
2013-06-30	16693
2013-09-30	16442
2013-12-31	16369
2014-03-31	19926
2014-06-30	17588
2014-09-30	19013
2014-12-31	19395
2015-03-31	16983
2015-06-30	17162
2015-09-30	16718
2015-12-31	14978
2016-03-31	18368
2016-06-30	16618
2016-09-30	17553
2016-12-31	18895
2017-03-31	20894
2017-06-30	22474
2017-09-30	20477
2017-12-31	21061
2018-03-31	25279
2018-06-30	26092
2018-09-30	26334
2018-12-31	25505
2019-03-31	26005
2019-06-30	27466
2019-09-30	26164
2019-12-31	25191
2020-03-31	25341
2020-06-30	27657
2020-09-30	25889
2020-12-31	26789
2021-03-31	32083
2021-06-30	31066
2021-09-30	30834
2021-12-31	30432
2022-03-31	28775
2022-06-30	27707
2022-09-30	27057
2022-12-31	23479
2023-03-31	22411
2023-06-30	21920
2023-09-30	24181