Quarter	US dollars
2004-12-31	22125
2005-03-31	21719
2005-06-30	22028
2005-09-30	23288
2005-12-31	24424
2006-03-31	24595
2006-06-30	25953
2006-09-30	25062
2006-12-31	28142
2007-03-31	27488
2007-06-30	29384
2007-09-30	31321
2007-12-31	32615
2008-03-31	38637
2008-06-30	40106
2008-09-30	39842
2008-12-31	42796
2009-03-31	38010
2009-06-30	40154
2009-09-30	42634
2009-12-31	42936
2010-03-31	47515
2010-06-30	51230
2010-09-30	55009
2010-12-31	58071
2011-03-31	64922
2011-06-30	69065
2011-09-30	66572
2011-12-31	69236
2012-03-31	68624
2012-06-30	66524
2012-09-30	67320
2012-12-31	71018
2013-03-31	72333
2013-06-30	68816
2013-09-30	71600
2013-12-31	73050
2014-03-31	76948
2014-06-30	76683
2014-09-30	78805
2014-12-31	72140
2015-03-31	67785
2015-06-30	69453
2015-09-30	65711
2015-12-31	59930
2016-03-31	61801
2016-06-30	65417
2016-09-30	62426
2016-12-31	58372
2017-03-31	62944
2017-06-30	61888
2017-09-30	65568
2017-12-31	68736
2018-03-31	67680
2018-06-30	63328
2018-09-30	65225
2018-12-31	69772
2019-03-31	72571
2019-06-30	71935
2019-09-30	70603
2019-12-31	76847
2020-03-31	75719
2020-06-30	85072
2020-09-30	88045
2020-12-31	93098
2021-03-31	92842
2021-06-30	93870
2021-09-30	97634
2021-12-31	99061
2022-03-31	96833
2022-06-30	101477
2022-09-30	100028
2022-12-31	107271
2023-03-31	110102
2023-06-30	104844
2023-09-30	98285