Quarterly US dollars
1999-03-31 5211
1999-06-30 4979
1999-09-30 4730
1999-12-31 4483
2000-03-31 5031
2000-06-30 6083
2000-09-30 9394
2000-12-31 8944
2001-03-31 7920
2001-06-30 6981
2001-09-30 6970
2001-12-31 6474
2002-03-31 5783
2002-06-30 5783
2002-09-30 5585
2002-12-31 5700
2003-03-31 5705
2003-06-30 4484
2003-09-30 4324
2003-12-31 4679
2004-03-31 4915
2004-06-30 3571
2004-09-30 4257
2004-12-31 3508
2005-03-31 4173
2005-06-30 4271
2005-09-30 4509
2005-12-31 3662
2006-03-31 3561
2006-06-30 4148
2006-09-30 4207
2006-12-31 5207
2007-03-31 7352
2007-06-30 8147
2007-09-30 7339
2007-12-31 7300
2008-03-31 8511
2008-06-30 8526
2008-09-30 6860
2008-12-31 7636
2009-03-31 8068
2009-06-30 8108
2009-09-30 7989
2009-12-31 6330
2010-03-31 8556
2010-06-30 8343
2010-09-30 9221
2010-12-31 7239
2011-03-31 10976
2011-06-30 10565
2011-09-30 11017
2011-12-31 10554
2012-03-31 12868
2012-06-30 14670
2012-09-30 15668
2012-12-31 16953
2013-03-31 15339
2013-06-30 14250
2013-09-30 14828
2013-12-31 15317
2014-03-31 16426
2014-06-30 16911
2014-09-30 17051
2014-12-31 16384
2015-03-31 17432
2015-06-30 14786
2015-09-30 14423
2015-12-31 14399
2016-03-31 15038
2016-06-30 13099
2016-09-30 11866
2016-12-31 10997
2017-03-31 12561
2017-06-30 13141
2017-09-30 10904
2017-12-31 11356
2018-03-31 11533
2018-06-30 11410
2018-09-30 10454
2018-12-31 9773
2019-03-31 10162
2019-06-30 9367
2019-09-30 8699
2019-12-31 8856
2020-03-31 10769
2020-06-30 9904
2020-09-30 9754
2020-12-31 10604
2021-03-31 8434
2021-06-30 8717
2021-09-30 7820
2021-12-31 6449
2022-03-31 7040
2022-06-30 6302
2022-09-30 5344
2022-12-31 5114
2023-03-31 4375
2023-06-30 5331
2023-09-30 5738