Quarter	US dollars
2004-12-31	8025
2005-03-31	8892
2005-06-30	8792
2005-09-30	9838
2005-12-31	9417
2006-03-31	10105
2006-06-30	11157
2006-09-30	10258
2006-12-31	10617
2007-03-31	10465
2007-06-30	11041
2007-09-30	21617
2007-12-31	22159
2008-03-31	23659
2008-06-30	23833
2008-09-30	22271
2008-12-31	22701
2009-03-31	22209
2009-06-30	21814
2009-09-30	21499
2009-12-31	22455
2010-03-31	24517
2010-06-30	27003
2010-09-30	27370
2010-12-31	30615
2011-03-31	33230
2011-06-30	35061
2011-09-30	34749
2011-12-31	35276
2012-03-31	35686
2012-06-30	35508
2012-09-30	35823
2012-12-31	36745
2013-03-31	38154
2013-06-30	37082
2013-09-30	37060
2013-12-31	36276
2014-03-31	37161
2014-06-30	36244
2014-09-30	36425
2014-12-31	37509
2015-03-31	37728
2015-06-30	36556
2015-09-30	34741
2015-12-31	32771
2016-03-31	31791
2016-06-30	31666
2016-09-30	31523
2016-12-31	30529
2017-03-31	34956
2017-06-30	33150
2017-09-30	35721
2017-12-31	36427
2018-03-31	38731
2018-06-30	36398
2018-09-30	37399
2018-12-31	37933
2019-03-31	37508
2019-06-30	37142
2019-09-30	35243
2019-12-31	36354
2020-03-31	35420
2020-06-30	34619
2020-09-30	34043
2020-12-31	37121
2021-03-31	38240
2021-06-30	36818
2021-09-30	39077
2021-12-31	38268
2022-03-31	38387
2022-06-30	34387
2022-09-30	33114
2022-12-31	32590
2023-03-31	34427
2023-06-30	30885
2023-09-30	30508