Quarterly US dollars
1999-03-31 6048
1999-06-30 6565
1999-09-30 6983
1999-12-31 7261
2000-03-31 6436
2000-06-30 6603
2000-09-30 6559
2000-12-31 6496
2001-03-31 6745
2001-06-30 7001
2001-09-30 7682
2001-12-31 7957
2002-03-31 6669
2002-06-30 6727
2002-09-30 6870
2002-12-31 6604
2003-03-31 6919
2003-06-30 7378
2003-09-30 7185
2003-12-31 6949
2004-03-31 8955
2004-06-30 9970
2004-09-30 9510
2004-12-31 9611
2005-03-31 10361
2005-06-30 9911
2005-09-30 11747
2005-12-31 12370
2006-03-31 12193
2006-06-30 14540
2006-09-30 15397
2006-12-31 15304
2007-03-31 16605
2007-06-30 16407
2007-09-30 21027
2007-12-31 17965
2008-03-31 20554
2008-06-30 19278
2008-09-30 17704
2008-12-31 15784
2009-03-31 14817
2009-06-30 14593
2009-09-30 19910
2009-12-31 18269
2010-03-31 14271
2010-06-30 13454
2010-09-30 14027
2010-12-31 13530
2011-03-31 13710
2011-06-30 14618
2011-09-30 15298
2011-12-31 12588
2012-03-31 14680
2012-06-30 14833
2012-09-30 14432
2012-12-31 15803
2013-03-31 17901
2013-06-30 15689
2013-09-30 15314
2013-12-31 15764
2014-03-31 14765
2014-06-30 14368
2014-09-30 14040
2014-12-31 13944
2015-03-31 13995
2015-06-30 15795
2015-09-30 15709
2015-12-31 15716
2016-03-31 16480
2016-06-30 18770
2016-09-30 19513
2016-12-31 18006
2017-03-31 17996
2017-06-30 16875
2017-09-30 17716
2017-12-31 18013
2018-03-31 18379
2018-06-30 17676
2018-09-30 15537
2018-12-31 15908
2019-03-31 15262
2019-06-30 15187
2019-09-30 16142
2019-12-31 16500
2020-03-31 17547
2020-06-30 18790
2020-09-30 16635
2020-12-31 16250
2021-03-31 17562
2021-06-30 17349
2021-09-30 18352
2021-12-31 17261
2022-03-31 15033
2022-06-30 14681
2022-09-30 14632
2022-12-31 13486
2023-03-31 12678
2023-06-30 13290
2023-09-30 14330