Quarter	US dollars
2004-12-31	31331
2005-03-31	32691
2005-06-30	32654
2005-09-30	28867
2005-12-31	28036
2006-03-31	34412
2006-06-30	36718
2006-09-30	36762
2006-12-31	37580
2007-03-31	38959
2007-06-30	37327
2007-09-30	49270
2007-12-31	48289
2008-03-31	47390
2008-06-30	45717
2008-09-30	42578
2008-12-31	39039
2009-03-31	31060
2009-06-30	34291
2009-09-30	29739
2009-12-31	27012
2010-03-31	24090
2010-06-30	23469
2010-09-30	25217
2010-12-31	25720
2011-03-31	24337
2011-06-30	25145
2011-09-30	21205
2011-12-31	17881
2012-03-31	15727
2012-06-30	13752
2012-09-30	15251
2012-12-31	16071
2013-03-31	15305
2013-06-30	18646
2013-09-30	19013
2013-12-31	20065
2014-03-31	19132
2014-06-30	18643
2014-09-30	14425
2014-12-31	16637
2015-03-31	13287
2015-06-30	13766
2015-09-30	12652
2015-12-31	13499
2016-03-31	13502
2016-06-30	13728
2016-09-30	10824
2016-12-31	12256
2017-03-31	9770
2017-06-30	9413
2017-09-30	10642
2017-12-31	10753
2018-03-31	11927
2018-06-30	11411
2018-09-30	11597
2018-12-31	13633
2019-03-31	10748
2019-06-30	10009
2019-09-30	11472
2019-12-31	10609
2020-03-31	11670
2020-06-30	12066
2020-09-30	11059
2020-12-31	14277
2021-03-31	12265
2021-06-30	14455
2021-09-30	15172
2021-12-31	15063
2022-03-31	15163
2022-06-30	16441
2022-09-30	16779
2022-12-31	12834
2023-03-31	13488
2023-06-30	13981
2023-09-30	13195