Quarterly US dollars
1999-03-31 12086
1999-06-30 11593
1999-09-30 10547
1999-12-31 9893
2000-03-31 9780
2000-06-30 9274
2000-09-30 9051
2000-12-31 10267
2001-03-31 8766
2001-06-30 8685
2001-09-30 8765
2001-12-31 7839
2002-03-31 7871
2002-06-30 8061
2002-09-30 7118
2002-12-31 7130
2003-03-31 7157
2003-06-30 7323
2003-09-30 9063
2003-12-31 11927
2004-03-31 13356
2004-06-30 14211
2004-09-30 13359
2004-12-31 15269
2005-03-31 21096
2005-06-30 23437
2005-09-30 24667
2005-12-31 30819
2006-03-31 40443
2006-06-30 36678
2006-09-30 39642
2006-12-31 35059
2007-03-31 42073
2007-06-30 43386
2007-09-30 53508
2007-12-31 50432
2008-03-31 50779
2008-06-30 47951
2008-09-30 54467
2008-12-31 40849
2009-03-31 33582
2009-06-30 40571
2009-09-30 33296
2009-12-31 32193
2010-03-31 34974
2010-06-30 37425
2010-09-30 45649
2010-12-31 39822
2011-03-31 51585
2011-06-30 53956
2011-09-30 43684
2011-12-31 46299
2012-03-31 49039
2012-06-30 48201
2012-09-30 52466
2012-12-31 51581
2013-03-31 64455
2013-06-30 63654
2013-09-30 64786
2013-12-31 60252
2014-03-31 58598
2014-06-30 60234
2014-09-30 58919
2014-12-31 52428
2015-03-31 49567
2015-06-30 50772
2015-09-30 47499
2015-12-31 45051
2016-03-31 43414
2016-06-30 45771
2016-09-30 45187
2016-12-31 40206
2017-03-31 44836
2017-06-30 39912
2017-09-30 41897
2017-12-31 44151
2018-03-31 44376
2018-06-30 38903
2018-09-30 34024
2018-12-31 34190
2019-03-31 34692
2019-06-30 28404
2019-09-30 25518
2019-12-31 31001
2020-03-31 24689
2020-06-30 20903
2020-09-30 23549
2020-12-31 23460
2021-03-31 21287
2021-06-30 20581
2021-09-30 20489
2021-12-31 22873
2022-03-31 24983
2022-06-30 26163
2022-09-30 28311
2022-12-31 22055
2023-03-31 21090
2023-06-30 22058
2023-09-30 24224