Quarterly US dollars
1999-03-31 20382
1999-06-30 18612
1999-09-30 16721
1999-12-31 14737
2000-03-31 17330
2000-06-30 15879
2000-09-30 12164
2000-12-31 14650
2001-03-31 16403
2001-06-30 14662
2001-09-30 15793
2001-12-31 16066
2002-03-31 17654
2002-06-30 14733
2002-09-30 14957
2002-12-31 16270
2003-03-31 15226
2003-06-30 12265
2003-09-30 13467
2003-12-31 18853
2004-03-31 21191
2004-06-30 19928
2004-09-30 20773
2004-12-31 23670
2005-03-31 24841
2005-06-30 18856
2005-09-30 23261
2005-12-31 21321
2006-03-31 26340
2006-06-30 34411
2006-09-30 27206
2006-12-31 34569
2007-03-31 33189
2007-06-30 33290
2007-09-30 40302
2007-12-31 43934
2008-03-31 44288
2008-06-30 35103
2008-09-30 41666
2008-12-31 29372
2009-03-31 32813
2009-06-30 30167
2009-09-30 25438
2009-12-31 24917
2010-03-31 26075
2010-06-30 32255
2010-09-30 30521
2010-12-31 23888
2011-03-31 28946
2011-06-30 26825
2011-09-30 34542
2011-12-31 30615
2012-03-31 33581
2012-06-30 31771
2012-09-30 37032
2012-12-31 30604
2013-03-31 30498
2013-06-30 31280
2013-09-30 29989
2013-12-31 26133
2014-03-31 25136
2014-06-30 26072
2014-09-30 27844
2014-12-31 28181
2015-03-31 27317
2015-06-30 28940
2015-09-30 30484
2015-12-31 26488
2016-03-31 23430
2016-06-30 25311
2016-09-30 30377
2016-12-31 21597
2017-03-31 18950
2017-06-30 19638
2017-09-30 22105
2017-12-31 19969
2018-03-31 25172
2018-06-30 23662
2018-09-30 22633
2018-12-31 20192
2019-03-31 19473
2019-06-30 18622
2019-09-30 21034
2019-12-31 17264
2020-03-31 18236
2020-06-30 16567
2020-09-30 18781
2020-12-31 20909
2021-03-31 21389
2021-06-30 22881
2021-09-30 26239
2021-12-31 25148
2022-03-31 22341
2022-06-30 19746
2022-09-30 19490
2022-12-31 18213
2023-03-31 23466
2023-06-30 20669
2023-09-30 16014