Quarter	US dollars
2004-12-31	35958
2005-03-31	36969
2005-06-30	38300
2005-09-30	40794
2005-12-31	43226
2006-03-31	45182
2006-06-30	49828
2006-09-30	50978
2006-12-31	52027
2007-03-31	54932
2007-06-30	58605
2007-09-30	62283
2007-12-31	70715
2008-03-31	70872
2008-06-30	70929
2008-09-30	69220
2008-12-31	55336
2009-03-31	53761
2009-06-30	58340
2009-09-30	64593
2009-12-31	65012
2010-03-31	67913
2010-06-30	65421
2010-09-30	65358
2010-12-31	67802
2011-03-31	69450
2011-06-30	74134
2011-09-30	64305
2011-12-31	67996
2012-03-31	69842
2012-06-30	72716
2012-09-30	76029
2012-12-31	73983
2013-03-31	75416
2013-06-30	72721
2013-09-30	76107
2013-12-31	71155
2014-03-31	68614
2014-06-30	69631
2014-09-30	65539
2014-12-31	65366
2015-03-31	58065
2015-06-30	57924
2015-09-30	56851
2015-12-31	56380
2016-03-31	59910
2016-06-30	60159
2016-09-30	60704
2016-12-31	58517
2017-03-31	58732
2017-06-30	60171
2017-09-30	62135
2017-12-31	63659
2018-03-31	63614
2018-06-30	62589
2018-09-30	65809
2018-12-31	62668
2019-03-31	65663
2019-06-30	68324
2019-09-30	68576
2019-12-31	67737
2020-03-31	67032
2020-06-30	76381
2020-09-30	77743
2020-12-31	79597
2021-03-31	79378
2021-06-30	79874
2021-09-30	84698
2021-12-31	85045
2022-03-31	85689
2022-06-30	85611
2022-09-30	81757
2022-12-31	80830
2023-03-31	77522
2023-06-30	78206
2023-09-30	75130