Quarter	US dollars
1999-09-30	444
1999-12-31	651
2000-03-31	599
2000-06-30	469
2000-09-30	420
2000-12-31	466
2001-03-31	497
2001-06-30	1873
2001-09-30	475
2001-12-31	503
2002-03-31	363
2002-06-30	439
2002-09-30	581
2002-12-31	600
2003-03-31	933
2003-06-30	1260
2003-09-30	1481
2003-12-31	1556
2004-03-31	1160
2004-06-30	1898
2004-09-30	3417
2004-12-31	4739
2005-03-31	7844
2005-06-30	10904
2005-09-30	10740
2005-12-31	10044
2006-03-31	8554
2006-06-30	9209
2006-09-30	10921
2006-12-31	12096
2007-03-31	10969
2007-06-30	21761
2007-09-30	17097
2007-12-31	25389
2008-03-31	27555
2008-06-30	15913
2008-09-30	11993
2008-12-31	44215
2009-03-31	26467
2009-06-30	19719
2009-09-30	15239
2009-12-31	12174
2010-03-31	18625
2010-06-30	19816
2010-09-30	18238
2010-12-31	21914
2011-03-31	20835
2011-06-30	16280
2011-09-30	22063
2011-12-31	21297
2012-03-31	19652
2012-06-30	21369
2012-09-30	21169
2012-12-31	22245
2013-03-31	19186
2013-06-30	18224
2013-09-30	13839
2013-12-31	12626
2014-03-31	13289
2014-06-30	16160
2014-09-30	16366
2014-12-31	16366
2015-03-31	18542
2015-06-30	17533
2015-09-30	15794
2015-12-31	14611
2016-03-31	14378
2016-06-30	12307
2016-09-30	14087
2016-12-31	10589
2017-03-31	9894
2017-06-30	11418
2017-09-30	13692
2017-12-31	13260
2018-03-31	15855
2018-06-30	15511
2018-09-30	11776
2018-12-31	11671
2019-03-31	11715
2019-06-30	14608
2019-09-30	17058
2019-12-31	15147
2020-03-31	15783
2020-06-30	13285
2020-09-30	17289
2020-12-31	16090
2021-03-31	15181
2021-06-30	11815
2021-09-30	12317
2021-12-31	16384
2022-03-31	15727
2022-06-30	14041
2022-09-30	11439
2022-12-31	6600
2023-03-31	11786
2023-06-30	15534
2023-09-30	14799
2023-12-31	14596