Quarter	US dollars
2004-12-31	32300
2005-03-31	33303
2005-06-30	37404
2005-09-30	37320
2005-12-31	39078
2006-03-31	41115
2006-06-30	44846
2006-09-30	45707
2006-12-31	49935
2007-03-31	49552
2007-06-30	52048
2007-09-30	56414
2007-12-31	62510
2008-03-31	65605
2008-06-30	70511
2008-09-30	67852
2008-12-31	58769
2009-03-31	59044
2009-06-30	54443
2009-09-30	57661
2009-12-31	56844
2010-03-31	58998
2010-06-30	62010
2010-09-30	67157
2010-12-31	71052
2011-03-31	73776
2011-06-30	82362
2011-09-30	75399
2011-12-31	74760
2012-03-31	75983
2012-06-30	72494
2012-09-30	72276
2012-12-31	71332
2013-03-31	72837
2013-06-30	68276
2013-09-30	76416
2013-12-31	66600
2014-03-31	66077
2014-06-30	67405
2014-09-30	66176
2014-12-31	64044
2015-03-31	59070
2015-06-30	59707
2015-09-30	53764
2015-12-31	51641
2016-03-31	53220
2016-06-30	55481
2016-09-30	30808
2016-12-31	29495
2017-03-31	30044
2017-06-30	31936
2017-09-30	32252
2017-12-31	30862
2018-03-31	32547
2018-06-30	30006
2018-09-30	30915
2018-12-31	30219
2019-03-31	32297
2019-06-30	35031
2019-09-30	33411
2019-12-31	33358
2020-03-31	29947
2020-06-30	30333
2020-09-30	28569
2020-12-31	28838
2021-03-31	28689
2021-06-30	30143
2021-09-30	30137
2021-12-31	29447
2022-03-31	32099
2022-06-30	32283
2022-09-30	32607
2022-12-31	32954
2023-03-31	35577
2023-06-30	37081
2023-09-30	36880