Quarter	US dollars
2004-12-31	10920
2005-03-31	12497
2005-06-30	55363
2005-09-30	57882
2005-12-31	63222
2006-03-31	65843
2006-06-30	69327
2006-09-30	64957
2006-12-31	68217
2007-03-31	66531
2007-06-30	69999
2007-09-30	72941
2007-12-31	70344
2008-03-31	70526
2008-06-30	69335
2008-09-30	62299
2008-12-31	59636
2009-03-31	56907
2009-06-30	60447
2009-09-30	63983
2009-12-31	67248
2010-03-31	71434
2010-06-30	72412
2010-09-30	76670
2010-12-31	71869
2011-03-31	74945
2011-06-30	77249
2011-09-30	68596
2011-12-31	68896
2012-03-31	72079
2012-06-30	69178
2012-09-30	67148
2012-12-31	67469
2013-03-31	64094
2013-06-30	58613
2013-09-30	60944
2013-12-31	59005
2014-03-31	58659
2014-06-30	60975
2014-09-30	60993
2014-12-31	55852
2015-03-31	55307
2015-06-30	53184
2015-09-30	51045
2015-12-31	49750
2016-03-31	51194
2016-06-30	49729
2016-09-30	52630
2016-12-31	48005
2017-03-31	53928
2017-06-30	51638
2017-09-30	51806
2017-12-31	57957
2018-03-31	58824
2018-06-30	57935
2018-09-30	58159
2018-12-31	59592
2019-03-31	57686
2019-06-30	57496
2019-09-30	57129
2019-12-31	61814
2020-03-31	64630
2020-06-30	68307
2020-09-30	68249
2020-12-31	76477
2021-03-31	74046
2021-06-30	76994
2021-09-30	73118
2021-12-31	75606
2022-03-31	75475
2022-06-30	71266
2022-09-30	65146
2022-12-31	74358
2023-03-31	72276
2023-06-30	67713
2023-09-30	59865