Quarter	US dollars
2004-12-31	29092
2005-03-31	29638
2005-06-30	30609
2005-09-30	77114
2005-12-31	81670
2006-03-31	91146
2006-06-30	85738
2006-09-30	86656
2006-12-31	96138
2007-03-31	103396
2007-06-30	114640
2007-09-30	130605
2007-12-31	132745
2008-03-31	138310
2008-06-30	144762
2008-09-30	145541
2008-12-31	129482
2009-03-31	132113
2009-06-30	140946
2009-09-30	142504
2009-12-31	144237
2010-03-31	148441
2010-06-30	151504
2010-09-30	159326
2010-12-31	164129
2011-03-31	156091
2011-06-30	157569
2011-09-30	151546
2011-12-31	144523
2012-03-31	148035
2012-06-30	147083
2012-09-30	149432
2012-12-31	146202
2013-03-31	140650
2013-06-30	137628
2013-09-30	138728
2013-12-31	137174
2014-03-31	149087
2014-06-30	150331
2014-09-30	147570
2014-12-31	146092
2015-03-31	144000
2015-06-30	145397
2015-09-30	142144
2015-12-31	140699
2016-03-31	132518
2016-06-30	135022
2016-09-30	136069
2016-12-31	134402
2017-03-31	140411
2017-06-30	86739
2017-09-30	90017
2017-12-31	92610
2018-03-31	89271
2018-06-30	83098
2018-09-30	80642
2018-12-31	81296
2019-03-31	81716
2019-06-30	83451
2019-09-30	81662
2019-12-31	83861
2020-03-31	82389
2020-06-30	80042
2020-09-30	76545
2020-12-31	75861
2021-03-31	74213
2021-06-30	75956
2021-09-30	73598
2021-12-31	73495
2022-03-31	73547
2022-06-30	74237
2022-09-30	71156
2022-12-31	75050
2023-03-31	75181
2023-06-30	75030
2023-09-30	69335