Quarter	US dollars
2004-12-31	115929
2005-03-31	115925
2005-06-30	155121
2005-09-30	151399
2005-12-31	135435
2006-03-31	147224
2006-06-30	175580
2006-09-30	132687
2006-12-31	123514
2007-03-31	155870
2007-06-30	214607
2007-09-30	249981
2007-12-31	348887
2008-03-31	590572
2008-06-30	616808
2008-09-30	565234
2008-12-31	1073562
2009-03-31	760272
2009-06-30	478596
2009-09-30	457822
2009-12-31	356309
2010-03-31	350892
2010-06-30	373152
2010-09-30	432040
2010-12-31	375372
2011-03-31	286224
2011-06-30	305384
2011-09-30	444089
2011-12-31	401714
2012-03-31	364233
2012-06-30	349723
2012-09-30	272543
2012-12-31	263857
2013-03-31	234580
2013-06-30	209396
2013-09-30	174973
2013-12-31	163667
2014-03-31	53219
2014-06-30	209811
2014-09-30	218371
2014-12-31	292110
2015-03-31	312727
2015-06-30	233897
2015-09-30	258106
2015-12-31	221574
2016-03-31	273701
2016-06-30	291838
2016-09-30	252887
2016-12-31	193767
2017-03-31	140345
2017-06-30	140457
2017-09-30	139946
2017-12-31	121595
2018-03-31	113106
2018-06-30	109860
2018-09-30	120962
2018-12-31	119050
2019-03-31	136025
2019-06-30	133825
2019-09-30	153448
2019-12-31	128730
2020-03-31	197290
2020-06-30	162913
2020-09-30	165905
2020-12-31	182340
2021-03-31	162019
2021-06-30	147481
2021-09-30	140056
2021-12-31	149312
2022-03-31	161866
2022-06-30	179513
2022-09-30	203550
2022-12-31	152963
2023-03-31	136313
2023-06-30	143085
2023-09-30	146466