Quarter	US dollars
2004-12-31	36895
2005-03-31	49373
2005-06-30	50308
2005-09-30	68249
2005-12-31	47965
2006-03-31	61099
2006-06-30	63000
2006-09-30	71474
2006-12-31	65605
2007-03-31	76332
2007-06-30	92204
2007-09-30	94637
2007-12-31	116191
2008-03-31	125109
2008-06-30	122594
2008-09-30	120397
2008-12-31	98530
2009-03-31	106958
2009-06-30	136454
2009-09-30	146635
2009-12-31	151002
2010-03-31	180619
2010-06-30	182025
2010-09-30	212354
2010-12-31	212089
2011-03-31	243044
2011-06-30	261098
2011-09-30	234958
2011-12-31	240236
2012-03-31	250293
2012-06-30	234775
2012-09-30	239654
2012-12-31	252583
2013-03-31	255680
2013-06-30	235836
2013-09-30	232261
2013-12-31	230278
2014-03-31	232580
2014-06-30	223615
2014-09-30	225429
2014-12-31	218510
2015-03-31	205635
2015-06-30	195659
2015-09-30	180072
2015-12-31	170158
2016-03-31	181689
2016-06-30	182645
2016-09-30	185143
2016-12-31	169412
2017-03-31	186557
2017-06-30	209516
2017-09-30	200171
2017-12-31	220870
2018-03-31	228198
2018-06-30	207898
2018-09-30	207559
2018-12-31	218223
2019-03-31	225470
2019-06-30	225895
2019-09-30	219446
2019-12-31	221373
2020-03-31	222752
2020-06-30	227030
2020-09-30	220987
2020-12-31	259368
2021-03-31	265385
2021-06-30	268882
2021-09-30	267763
2021-12-31	292538
2022-03-31	280506
2022-06-30	250777
2022-09-30	264637
2022-12-31	264624
2023-03-31	281446
2023-06-30	271788
2023-09-30	258806