Quarter	US dollars
2004-12-31	20132
2005-03-31	19654
2005-06-30	19544
2005-09-30	20223
2005-12-31	20561
2006-03-31	20053
2006-06-30	21166
2006-09-30	20644
2006-12-31	21529
2007-03-31	21157
2007-06-30	21856
2007-09-30	23834
2007-12-31	24785
2008-03-31	30140
2008-06-30	31858
2008-09-30	33206
2008-12-31	32665
2009-03-31	32828
2009-06-30	35945
2009-09-30	39364
2009-12-31	40580
2010-03-31	41027
2010-06-30	45613
2010-09-30	50181
2010-12-31	52344
2011-03-31	57708
2011-06-30	61389
2011-09-30	57758
2011-12-31	58426
2012-03-31	61719
2012-06-30	64612
2012-09-30	70621
2012-12-31	71657
2013-03-31	72265
2013-06-30	70605
2013-09-30	78573
2013-12-31	78460
2014-03-31	83420
2014-06-30	86933
2014-09-30	89059
2014-12-31	84382
2015-03-31	80891
2015-06-30	79707
2015-09-30	74561
2015-12-31	65814
2016-03-31	66179
2016-06-30	65599
2016-09-30	62210
2016-12-31	61381
2017-03-31	62763
2017-06-30	64310
2017-09-30	64139
2017-12-31	66791
2018-03-31	64715
2018-06-30	64849
2018-09-30	64696
2018-12-31	64282
2019-03-31	67545
2019-06-30	70257
2019-09-30	70952
2019-12-31	71921
2020-03-31	68080
2020-06-30	65943
2020-09-30	68995
2020-12-31	74236
2021-03-31	75988
2021-06-30	74509
2021-09-30	75936
2021-12-31	80270
2022-03-31	81843
2022-06-30	78365
2022-09-30	74777
2022-12-31	74673
2023-03-31	78116
2023-06-30	76278
2023-09-30	75791