Quarterly US dollars
1999-03-31 13953
1999-06-30 14652
1999-09-30 14002
1999-12-31 10052
2000-03-31 9975
2000-06-30 12632
2000-09-30 15774
2000-12-31 12178
2001-03-31 11450
2001-06-30 11641
2001-09-30 9765
2001-12-31 9414
2002-03-31 11404
2002-06-30 12889
2002-09-30 15727
2002-12-31 14292
2003-03-31 18527
2003-06-30 22610
2003-09-30 25625
2003-12-31 25900
2004-03-31 29275
2004-06-30 31510
2004-09-30 30272
2004-12-31 36156
2005-03-31 36384
2005-06-30 34151
2005-09-30 30593
2005-12-31 31358
2006-03-31 27763
2006-06-30 27585
2006-09-30 33967
2006-12-31 30004
2007-03-31 36954
2007-06-30 40094
2007-09-30 48999
2007-12-31 48669
2008-03-31 40476
2008-06-30 40124
2008-09-30 28701
2008-12-31 41734
2009-03-31 38283
2009-06-30 31265
2009-09-30 34192
2009-12-31 23988
2010-03-31 23352
2010-06-30 20197
2010-09-30 21098
2010-12-31 15944
2011-03-31 17962
2011-06-30 18900
2011-09-30 19445
2011-12-31 16708
2012-03-31 21306
2012-06-30 26187
2012-09-30 17848
2012-12-31 16960
2013-03-31 22137
2013-06-30 21603
2013-09-30 27594
2013-12-31 28701
2014-03-31 28772
2014-06-30 19572
2014-09-30 14189
2014-12-31 12943
2015-03-31 16338
2015-06-30 12686
2015-09-30 10934
2015-12-31 11214
2016-03-31 11965
2016-06-30 11208
2016-09-30 11342
2016-12-31 11528
2017-03-31 10738
2017-06-30 8718
2017-09-30 9243
2017-12-31 8561
2018-03-31 10697
2018-06-30 8298
2018-09-30 8697
2018-12-31 5308
2019-03-31 7782
2019-06-30 5633
2019-09-30 6564
2019-12-31 4547
2020-03-31 4800
2020-06-30 5093
2020-09-30 5262
2020-12-31 4997
2021-03-31 3723
2021-06-30 3610
2021-09-30 3221
2021-12-31 3842
2022-03-31 3515
2022-06-30 3463
2022-09-30 3551
2022-12-31 3767
2023-03-31 1785
2023-06-30 2159
2023-09-30 2090