Quarter	US dollars
2004-12-31	11635
2005-03-31	12259
2005-06-30	12209
2005-09-30	16832
2005-12-31	22324
2006-03-31	21553
2006-06-30	22540
2006-09-30	21679
2006-12-31	26549
2007-03-31	28759
2007-06-30	34476
2007-09-30	39285
2007-12-31	38072
2008-03-31	37045
2008-06-30	39856
2008-09-30	38574
2008-12-31	35790
2009-03-31	33942
2009-06-30	32521
2009-09-30	32392
2009-12-31	33339
2010-03-31	25910
2010-06-30	23860
2010-09-30	24631
2010-12-31	24030
2011-03-31	18630
2011-06-30	18500
2011-09-30	18238
2011-12-31	18883
2012-03-31	18595
2012-06-30	17628
2012-09-30	18886
2012-12-31	21005
2013-03-31	22205
2013-06-30	20202
2013-09-30	18152
2013-12-31	18323
2014-03-31	23702
2014-06-30	22098
2014-09-30	20466
2014-12-31	23734
2015-03-31	24704
2015-06-30	23178
2015-09-30	24668
2015-12-31	24434
2016-03-31	19495
2016-06-30	19370
2016-09-30	19564
2016-12-31	21657
2017-03-31	22912
2017-06-30	17084
2017-09-30	17959
2017-12-31	21416
2018-03-31	19116
2018-06-30	20014
2018-09-30	20302
2018-12-31	23435
2019-03-31	20066
2019-06-30	20063
2019-09-30	21056
2019-12-31	22514
2020-03-31	22211
2020-06-30	18404
2020-09-30	17285
2020-12-31	18120
2021-03-31	20239
2021-06-30	22734
2021-09-30	21777
2021-12-31	20171
2022-03-31	24625
2022-06-30	23077
2022-09-30	20346
2022-12-31	24283
2023-03-31	22687
2023-06-30	24218
2023-09-30	24526