Quarter	US dollars
2004-12-31	4018
2005-03-31	3025
2005-06-30	2255
2005-09-30	3071
2005-12-31	2730
2006-03-31	3632
2006-06-30	4050
2006-09-30	4089
2006-12-31	5223
2007-03-31	5529
2007-06-30	4553
2007-09-30	7732
2007-12-31	9190
2008-03-31	10631
2008-06-30	10313
2008-09-30	9331
2008-12-31	9320
2009-03-31	9633
2009-06-30	10283
2009-09-30	10506
2009-12-31	8426
2010-03-31	9784
2010-06-30	9160
2010-09-30	10274
2010-12-31	10578
2011-03-31	7619
2011-06-30	6567
2011-09-30	9712
2011-12-31	8681
2012-03-31	8409
2012-06-30	9208
2012-09-30	9993
2012-12-31	10005
2013-03-31	11513
2013-06-30	9942
2013-09-30	10818
2013-12-31	11047
2014-03-31	11241
2014-06-30	10171
2014-09-30	9760
2014-12-31	9565
2015-03-31	11002
2015-06-30	8775
2015-09-30	8959
2015-12-31	7826
2016-03-31	8769
2016-06-30	9079
2016-09-30	9360
2016-12-31	8882
2017-03-31	8626
2017-06-30	7202
2017-09-30	6550
2017-12-31	7710
2018-03-31	7682
2018-06-30	7733
2018-09-30	8723
2018-12-31	6794
2019-03-31	6657
2019-06-30	6025
2019-09-30	6231
2019-12-31	5952
2020-03-31	5535
2020-06-30	7034
2020-09-30	6943
2020-12-31	7290
2021-03-31	8273
2021-06-30	9900
2021-09-30	9228
2021-12-31	10466
2022-03-31	10809
2022-06-30	10010
2022-09-30	9358
2022-12-31	8543
2023-03-31	8372
2023-06-30	8323
2023-09-30	8335