Quarter	US dollars
2004-12-31	22553
2005-03-31	22936
2005-06-30	20411
2005-09-30	24485
2005-12-31	22688
2006-03-31	24333
2006-06-30	30147
2006-09-30	29245
2006-12-31	31680
2007-03-31	40113
2007-06-30	49151
2007-09-30	34043
2007-12-31	37025
2008-03-31	37528
2008-06-30	40248
2008-09-30	35615
2008-12-31	30831
2009-03-31	27825
2009-06-30	29448
2009-09-30	27911
2009-12-31	27623
2010-03-31	26155
2010-06-30	26602
2010-09-30	28939
2010-12-31	27229
2011-03-31	29649
2011-06-30	29145
2011-09-30	29684
2011-12-31	30313
2012-03-31	28926
2012-06-30	29697
2012-09-30	35928
2012-12-31	37211
2013-03-31	35489
2013-06-30	36128
2013-09-30	41395
2013-12-31	38434
2014-03-31	38221
2014-06-30	39262
2014-09-30	37469
2014-12-31	35040
2015-03-31	31897
2015-06-30	30874
2015-09-30	31101
2015-12-31	31756
2016-03-31	32762
2016-06-30	27233
2016-09-30	39196
2016-12-31	34098
2017-03-31	34119
2017-06-30	34440
2017-09-30	34474
2017-12-31	39014
2018-03-31	36435
2018-06-30	30585
2018-09-30	33695
2018-12-31	46037
2019-03-31	55741
2019-06-30	54099
2019-09-30	55207
2019-12-31	48127
2020-03-31	56834
2020-06-30	58126
2020-09-30	66177
2020-12-31	59994
2021-03-31	52611
2021-06-30	44572
2021-09-30	50762
2021-12-31	56645
2022-03-31	49221
2022-06-30	34924
2022-09-30	42960
2022-12-31	50436
2023-03-31	46372
2023-06-30	52708
2023-09-30	48997