Quarter	US dollars
2004-12-31	23832
2005-03-31	22496
2005-06-30	23371
2005-09-30	73817
2005-12-31	77951
2006-03-31	85520
2006-06-30	82787
2006-09-30	82926
2006-12-31	92541
2007-03-31	98585
2007-06-30	104092
2007-09-30	123676
2007-12-31	133486
2008-03-31	135693
2008-06-30	144929
2008-09-30	140397
2008-12-31	120963
2009-03-31	123343
2009-06-30	135395
2009-09-30	138421
2009-12-31	141611
2010-03-31	145732
2010-06-30	146111
2010-09-30	155650
2010-12-31	165340
2011-03-31	161396
2011-06-30	163233
2011-09-30	149789
2011-12-31	147982
2012-03-31	154758
2012-06-30	153789
2012-09-30	154851
2012-12-31	154899
2013-03-31	151298
2013-06-30	144992
2013-09-30	145961
2013-12-31	143787
2014-03-31	149095
2014-06-30	148778
2014-09-30	145491
2014-12-31	145025
2015-03-31	142996
2015-06-30	146229
2015-09-30	140051
2015-12-31	138593
2016-03-31	132335
2016-06-30	130222
2016-09-30	132480
2016-12-31	127618
2017-03-31	133939
2017-06-30	73169
2017-09-30	72061
2017-12-31	72138
2018-03-31	73857
2018-06-30	68669
2018-09-30	68730
2018-12-31	67810
2019-03-31	69081
2019-06-30	69265
2019-09-30	69357
2019-12-31	71526
2020-03-31	71930
2020-06-30	72439
2020-09-30	69357
2020-12-31	71278
2021-03-31	71432
2021-06-30	70686
2021-09-30	72723
2021-12-31	74576
2022-03-31	74822
2022-06-30	72142
2022-09-30	70695
2022-12-31	65902
2023-03-31	67607
2023-06-30	64726
2023-09-30	61462