Quarter	US dollars
2004-12-31	1309
2005-03-31	1448
2005-06-30	1656
2005-09-30	1588
2005-12-31	1174
2006-03-31	1502
2006-06-30	1690
2006-09-30	1622
2006-12-31	1660
2007-03-31	1618
2007-06-30	1808
2007-09-30	2064
2007-12-31	1893
2008-03-31	2097
2008-06-30	2297
2008-09-30	3042
2008-12-31	2514
2009-03-31	2554
2009-06-30	2366
2009-09-30	2309
2009-12-31	2277
2010-03-31	2642
2010-06-30	3079
2010-09-30	3354
2010-12-31	4391
2011-03-31	4014
2011-06-30	4788
2011-09-30	5429
2011-12-31	5450
2012-03-31	5424
2012-06-30	5575
2012-09-30	5765
2012-12-31	7950
2013-03-31	19568
2013-06-30	19679
2013-09-30	19671
2013-12-31	20040
2014-03-31	19831
2014-06-30	19684
2014-09-30	17674
2014-12-31	12646
2015-03-31	12244
2015-06-30	13516
2015-09-30	15268
2015-12-31	15139
2016-03-31	16103
2016-06-30	16557
2016-09-30	16330
2016-12-31	14917
2017-03-31	16776
2017-06-30	15136
2017-09-30	16154
2017-12-31	16370
2018-03-31	16367
2018-06-30	17856
2018-09-30	18282
2018-12-31	17634
2019-03-31	18271
2019-06-30	21202
2019-09-30	22823
2019-12-31	23112
2020-03-31	27254
2020-06-30	26962
2020-09-30	27271
2020-12-31	25532
2021-03-31	26828
2021-06-30	24703
2021-09-30	24194
2021-12-31	23194
2022-03-31	25233
2022-06-30	23643
2022-09-30	24857
2022-12-31	25089
2023-03-31	24894
2023-06-30	22975
2023-09-30	23314