Quarter	US dollars
2004-12-31	134280
2005-03-31	139462
2005-06-30	185771
2005-09-30	252595
2005-12-31	265335
2006-03-31	284168
2006-06-30	288527
2006-09-30	289451
2006-12-31	318829
2007-03-31	336900
2007-06-30	352986
2007-09-30	400190
2007-12-31	428113
2008-03-31	451075
2008-06-30	467960
2008-09-30	449187
2008-12-31	406947
2009-03-31	401447
2009-06-30	429667
2009-09-30	448212
2009-12-31	462463
2010-03-31	494268
2010-06-30	516740
2010-09-30	559681
2010-12-31	580290
2011-03-31	600607
2011-06-30	632411
2011-09-30	589075
2011-12-31	587968
2012-03-31	612573
2012-06-30	599089
2012-09-30	597293
2012-12-31	595801
2013-03-31	601828
2013-06-30	579452
2013-09-30	591612
2013-12-31	587965
2014-03-31	602244
2014-06-30	610925
2014-09-30	599938
2014-12-31	588467
2015-03-31	572607
2015-06-30	559226
2015-09-30	519610
2015-12-31	506882
2016-03-31	507815
2016-06-30	493971
2016-09-30	468817
2016-12-31	442438
2017-03-31	464986
2017-06-30	424650
2017-09-30	430179
2017-12-31	447139
2018-03-31	457546
2018-06-30	438073
2018-09-30	432230
2018-12-31	442058
2019-03-31	448087
2019-06-30	450364
2019-09-30	440243
2019-12-31	456614
2020-03-31	458340
2020-06-30	459897
2020-09-30	459502
2020-12-31	495302
2021-03-31	498894
2021-06-30	506585
2021-09-30	506431
2021-12-31	516205
2022-03-31	519174
2022-06-30	498179
2022-09-30	481146
2022-12-31	494914
2023-03-31	504195
2023-06-30	493661
2023-09-30	489144