Quarter	US dollars
2004-12-31	52
2005-03-31	85
2005-06-30	75
2005-09-30	60
2005-12-31	93
2006-03-31	80
2006-06-30	80
2006-09-30	56
2006-12-31	61
2007-03-31	80
2007-06-30	88
2007-09-30	92
2007-12-31	145
2008-03-31	332
2008-06-30	438
2008-09-30	472
2008-12-31	459
2009-03-31	371
2009-06-30	502
2009-09-30	539
2009-12-31	565
2010-03-31	663
2010-06-30	836
2010-09-30	952
2010-12-31	955
2011-03-31	987
2011-06-30	999
2011-09-30	989
2011-12-31	1033
2012-03-31	922
2012-06-30	875
2012-09-30	1043
2013-06-30	927
2013-12-31	922
2014-03-31	955
2014-06-30	923
2014-09-30	793
2014-12-31	926
2015-03-31	904
2015-06-30	590
2015-09-30	566
2015-12-31	504
2016-03-31	486
2016-06-30	478
2016-09-30	596
2016-12-31	603
2017-03-31	708
2017-06-30	1157
2017-09-30	1110
2017-12-31	1032
2018-03-31	1110
2018-06-30	1044
2018-09-30	1069
2018-12-31	919
2019-03-31	943
2019-06-30	841
2019-09-30	853
2019-12-31	838
2020-03-31	850
2020-06-30	753
2020-09-30	857
2020-12-31	789
2021-03-31	741
2021-06-30	757
2021-09-30	792
2021-12-31	616
2022-03-31	512
2022-06-30	429
2022-09-30	762
2022-12-31	349
2023-03-31	288
2023-06-30	332
2023-09-30	272