Quarter	US dollars
2004-12-31	10076
2005-03-31	9301
2005-06-30	7023
2005-09-30	7397
2005-12-31	7389
2006-03-31	12044
2006-06-30	13203
2006-09-30	15981
2006-12-31	13390
2007-03-31	14696
2007-06-30	12004
2007-09-30	16212
2007-12-31	21749
2008-03-31	26907
2008-06-30	31981
2008-09-30	26111
2008-12-31	23730
2009-03-31	24165
2009-06-30	30891
2009-09-30	28659
2009-12-31	29924
2010-03-31	29507
2010-06-30	26935
2010-09-30	33040
2010-12-31	31834
2011-03-31	35168
2011-06-30	35511
2011-09-30	33504
2011-12-31	32357
2012-03-31	33405
2012-06-30	29242
2012-09-30	26428
2012-12-31	25727
2013-03-31	26350
2013-06-30	23785
2013-09-30	34607
2013-12-31	36646
2014-03-31	22245
2014-06-30	20795
2014-09-30	18540
2014-12-31	18556
2015-03-31	18052
2015-06-30	21491
2015-09-30	21341
2015-12-31	18371
2016-03-31	23164
2016-06-30	27626
2016-09-30	28196
2016-12-31	28258
2017-03-31	23683
2017-06-30	22947
2017-09-30	22574
2017-12-31	21709
2018-03-31	27505
2018-06-30	28693
2018-09-30	28909
2018-12-31	30334
2019-03-31	29168
2019-06-30	28243
2019-09-30	27543
2019-12-31	27598
2020-03-31	30976
2020-06-30	35249
2020-09-30	33871
2020-12-31	36418
2021-03-31	37847
2021-06-30	36010
2021-09-30	32354
2021-12-31	35016
2022-03-31	32301
2022-06-30	31328
2022-09-30	31110
2022-12-31	42364
2023-03-31	35185
2023-06-30	39256
2023-09-30	44629