Quarter	US dollars
2004-12-31	27084
2005-03-31	26186
2005-06-30	27183
2005-09-30	28136
2005-12-31	27129
2006-03-31	25227
2006-06-30	26104
2006-09-30	28847
2006-12-31	25807
2007-03-31	24954
2007-06-30	26023
2007-09-30	28289
2007-12-31	25770
2008-03-31	26386
2008-06-30	24930
2008-09-30	34730
2008-12-31	43497
2009-03-31	53521
2009-06-30	72008
2009-09-30	74654
2009-12-31	86250
2010-03-31	77861
2010-06-30	77349
2010-09-30	80525
2010-12-31	72836
2011-03-31	72800
2011-06-30	73551
2011-09-30	80857
2011-12-31	77702
2012-03-31	83312
2012-06-30	80113
2012-09-30	85254
2012-12-31	94916
2013-03-31	99625
2013-06-30	93057
2013-09-30	99532
2013-12-31	105573
2014-03-31	100366
2014-06-30	97402
2014-09-30	107847
2014-12-31	95032
2015-03-31	100251
2015-06-30	109670
2015-09-30	116205
2015-12-31	106857
2016-03-31	115470
2016-06-30	118562
2016-09-30	123864
2016-12-31	115998
2017-03-31	112342
2017-06-30	103754
2017-09-30	108015
2017-12-31	108784
2018-03-31	102828
2018-06-30	103290
2018-09-30	110919
2018-12-31	114442
2019-03-31	105607
2019-06-30	112123
2019-09-30	114438
2019-12-31	117597
2020-03-31	110579
2020-06-30	123039
2020-09-30	130875
2020-12-31	141627
2021-03-31	139592
2021-06-30	131616
2021-09-30	139794
2021-12-31	126965
2022-03-31	142400
2022-06-30	144129
2022-09-30	148616
2022-12-31	142500
2023-03-31	140822
2023-06-30	139678
2023-09-30	140988