Quarterly US dollars
1999-03-31 4004
1999-06-30 3998
1999-09-30 4647
1999-12-31 4455
2000-03-31 4511
2000-06-30 4945
2000-09-30 5089
2000-12-31 4624
2001-03-31 4294
2001-06-30 2919
2001-09-30 4244
2001-12-31 4288
2002-03-31 4477
2002-06-30 4325
2002-09-30 4080
2002-12-31 4167
2003-03-31 3828
2003-06-30 3632
2003-09-30 3944
2003-12-31 3816
2004-03-31 4883
2004-06-30 5431
2004-09-30 5332
2004-12-31 6591
2005-03-31 7214
2005-06-30 5970
2005-09-30 5946
2005-12-31 7165
2006-03-31 9195
2006-06-30 8781
2006-09-30 12861
2006-12-31 15568
2007-03-31 15869
2007-06-30 16720
2007-09-30 19569
2007-12-31 20184
2008-03-31 19281
2008-06-30 21159
2008-09-30 18810
2008-12-31 15702
2009-03-31 14078
2009-06-30 15416
2009-09-30 17473
2009-12-31 16999
2010-03-31 16899
2010-06-30 16814
2010-09-30 18396
2010-12-31 18856
2011-03-31 20112
2011-06-30 21123
2011-09-30 17340
2011-12-31 16571
2012-03-31 16773
2012-06-30 19714
2012-09-30 20905
2012-12-31 21974
2013-03-31 19004
2013-06-30 17088
2013-09-30 14464
2013-12-31 14613
2014-03-31 11658
2014-06-30 12741
2014-09-30 11381
2014-12-31 12118
2015-03-31 10691
2015-06-30 9950
2015-09-30 10709
2015-12-31 11360
2016-03-31 12785
2016-06-30 12884
2016-09-30 13442
2016-12-31 11843
2017-03-31 11512
2017-06-30 11261
2017-09-30 10601
2017-12-31 10745
2018-03-31 11405
2018-06-30 10947
2018-09-30 11157
2018-12-31 10766
2019-03-31 11146
2019-06-30 10633
2019-09-30 10181
2019-12-31 9560
2020-03-31 9312
2020-06-30 8734
2020-09-30 8738
2020-12-31 9159
2021-03-31 8786
2021-06-30 8162
2021-09-30 8653
2021-12-31 8749
2022-03-31 8224
2022-06-30 7509
2022-09-30 7355
2022-12-31 7890
2023-03-31 8146
2023-06-30 8914
2023-09-30 8122