Quarter	US dollars
2004-12-31	8223
2005-03-31	9420
2005-06-30	9178
2005-09-30	9911
2005-12-31	9857
2006-03-31	10400
2006-06-30	11474
2006-09-30	11047
2006-12-31	11126
2007-03-31	11619
2007-06-30	11651
2007-09-30	22581
2007-12-31	23075
2008-03-31	26205
2008-06-30	25738
2008-09-30	24482
2008-12-31	24238
2009-03-31	23983
2009-06-30	23525
2009-09-30	23681
2009-12-31	25530
2010-03-31	26785
2010-06-30	28916
2010-09-30	29563
2010-12-31	32933
2011-03-31	35654
2011-06-30	37232
2011-09-30	36569
2011-12-31	36955
2012-03-31	37632
2012-06-30	37115
2012-09-30	37882
2012-12-31	38591
2013-03-31	39715
2013-06-30	38867
2013-09-30	38966
2013-12-31	38471
2014-03-31	38985
2014-06-30	38513
2014-09-30	38628
2014-12-31	39430
2015-03-31	39861
2015-06-30	38501
2015-09-30	36120
2015-12-31	34804
2016-03-31	33015
2016-06-30	32984
2016-09-30	33691
2016-12-31	32919
2017-03-31	37004
2017-06-30	35373
2017-09-30	38081
2017-12-31	39151
2018-03-31	41656
2018-06-30	39272
2018-09-30	39625
2018-12-31	40448
2019-03-31	40157
2019-06-30	39765
2019-09-30	39641
2019-12-31	39947
2020-03-31	39867
2020-06-30	37391
2020-09-30	37305
2020-12-31	40254
2021-03-31	42414
2021-06-30	40291
2021-09-30	42220
2021-12-31	40372
2022-03-31	40738
2022-06-30	37720
2022-09-30	36152
2022-12-31	34838
2023-03-31	36160
2023-06-30	33854
2023-09-30	33988