Quarter	US dollars
2004-12-31	29398
2005-03-31	35394
2005-06-30	31148
2005-09-30	34971
2005-12-31	25267
2006-03-31	30234
2006-06-30	29631
2006-09-30	31640
2006-12-31	29296
2007-03-31	39334
2007-06-30	36019
2007-09-30	49162
2007-12-31	38998
2008-03-31	47778
2008-06-30	48055
2008-09-30	46759
2008-12-31	19642
2009-03-31	24037
2009-06-30	23039
2009-09-30	18675
2009-12-31	26772
2010-03-31	25810
2010-06-30	26890
2010-09-30	32228
2010-12-31	26235
2011-03-31	32212
2011-06-30	32732
2011-09-30	30228
2011-12-31	28965
2012-03-31	30210
2012-06-30	29738
2012-09-30	33873
2012-12-31	28394
2013-03-31	30376
2013-06-30	34048
2013-09-30	34082
2013-12-31	32611
2014-03-31	28831
2014-06-30	32551
2014-09-30	31080
2014-12-31	30069
2015-03-31	29605
2015-06-30	28024
2015-09-30	26097
2015-12-31	21474
2016-03-31	26729
2016-06-30	24748
2016-09-30	22380
2016-12-31	24941
2017-03-31	25541
2017-06-30	27453
2017-09-30	27005
2017-12-31	26480
2018-03-31	28721
2018-06-30	29639
2018-09-30	28675
2018-12-31	26741
2019-03-31	27298
2019-06-30	24419
2019-09-30	23171
2019-12-31	20217
2020-03-31	24212
2020-06-30	22477
2020-09-30	24980
2020-12-31	22017
2021-03-31	32083
2021-06-30	27486
2021-09-30	27789
2021-12-31	26171
2022-03-31	28315
2022-06-30	28358
2022-09-30	31057
2022-12-31	31551
2023-03-31	31615
2023-06-30	32829
2023-09-30	31957