Quarter	US dollars
2004-12-31	1392
2005-03-31	1535
2005-06-30	1509
2005-09-30	1836
2005-12-31	1940
2006-03-31	2015
2006-06-30	2166
2006-09-30	2389
2006-12-31	2701
2007-03-31	4356
2007-06-30	4318
2007-09-30	5743
2007-12-31	5947
2008-03-31	6298
2008-06-30	5960
2008-09-30	6760
2008-12-31	6031
2009-03-31	6476
2009-06-30	6729
2009-09-30	6586
2009-12-31	7105
2010-03-31	8346
2010-06-30	9266
2010-09-30	10660
2010-12-31	11849
2011-03-31	8736
2011-06-30	9038
2011-09-30	8389
2011-12-31	8139
2012-03-31	7915
2012-06-30	7878
2012-09-30	7193
2012-12-31	6834
2013-03-31	6699
2013-06-30	6206
2013-09-30	6947
2013-12-31	6530
2014-03-31	6214
2014-06-30	6589
2014-09-30	7803
2014-12-31	7848
2015-03-31	7086
2015-06-30	8000
2015-09-30	8098
2015-12-31	6912
2016-03-31	7012
2016-06-30	6974
2016-09-30	6533
2016-12-31	6508
2017-03-31	8216
2017-06-30	8429
2017-09-30	8445
2017-12-31	7140
2018-03-31	7487
2018-06-30	7177
2018-09-30	6798
2018-12-31	6953
2019-03-31	6928
2019-06-30	7039
2019-09-30	6607
2019-12-31	7744
2020-03-31	7323
2020-06-30	6383
2020-09-30	7327
2020-12-31	7623
2021-03-31	7490
2021-06-30	7473
2021-09-30	7014
2021-12-31	7800
2022-03-31	7637
2022-06-30	7870
2022-09-30	7468
2022-12-31	6879
2023-03-31	9007
2023-06-30	10195
2023-09-30	9632