Quarterly US dollars
1999-03-31 22231
1999-06-30 20310
1999-09-30 19672
1999-12-31 20163
2000-03-31 20863
2000-06-30 18482
2000-09-30 18106
2000-12-31 17591
2001-03-31 16534
2001-06-30 16207
2001-09-30 15452
2001-12-31 16920
2002-03-31 17420
2002-06-30 17379
2002-09-30 16222
2002-12-31 17884
2003-03-31 15876
2003-06-30 15539
2003-09-30 17083
2003-12-31 15494
2004-03-31 20329
2004-06-30 16609
2004-09-30 15285
2004-12-31 16666
2005-03-31 14933
2005-06-30 15367
2005-09-30 18274
2005-12-31 17803
2006-03-31 21782
2006-06-30 23470
2006-09-30 27660
2006-12-31 23531
2007-03-31 23063
2007-06-30 26912
2007-09-30 25702
2007-12-31 24983
2008-03-31 25366
2008-06-30 28001
2008-09-30 23925
2008-12-31 18615
2009-03-31 19032
2009-06-30 20325
2009-09-30 22667
2009-12-31 23280
2010-03-31 24024
2010-06-30 23402
2010-09-30 27181
2010-12-31 27208
2011-03-31 28665
2011-06-30 32553
2011-09-30 30760
2011-12-31 33483
2012-03-31 40698
2012-06-30 34127
2012-09-30 33177
2012-12-31 35843
2013-03-31 34895
2013-06-30 28870
2013-09-30 38452
2013-12-31 40527
2014-03-31 33180
2014-06-30 32133
2014-09-30 32054
2014-12-31 31419
2015-03-31 33020
2015-06-30 31471
2015-09-30 30215
2015-12-31 32234
2016-03-31 18905
2016-06-30 18382
2016-09-30 17585
2016-12-31 16794
2017-03-31 17297
2017-06-30 15668
2017-09-30 17424
2017-12-31 16315
2018-03-31 17158
2018-06-30 15700
2018-09-30 16013
2018-12-31 17572
2019-03-31 17521
2019-06-30 19511
2019-09-30 18067
2019-12-31 16198
2020-03-31 14428
2020-06-30 14188
2020-09-30 13029
2020-12-31 20401
2021-03-31 16913
2021-06-30 17299
2021-09-30 16037
2021-12-31 17135
2022-03-31 19640
2022-06-30 19146
2022-09-30 19394
2022-12-31 23325
2023-03-31 25641
2023-06-30 29119
2023-09-30 27508