Quarterly US dollars
1999-03-31 12644
1999-06-30 14764
1999-09-30 11746
1999-12-31 10598
2000-03-31 11553
2000-06-30 12437
2000-09-30 11409
2000-12-31 10534
2001-03-31 11566
2001-06-30 10938
2001-09-30 10039
2001-12-31 8442
2002-03-31 10242
2002-06-30 8088
2002-09-30 8517
2002-12-31 9808
2003-03-31 12360
2003-06-30 13427
2003-09-30 13996
2003-12-31 16147
2004-03-31 15009
2004-06-30 15894
2004-09-30 18756
2004-12-31 20718
2005-03-31 27975
2005-06-30 26422
2005-09-30 23303
2005-12-31 18613
2006-03-31 20536
2006-06-30 19454
2006-09-30 25790
2006-12-31 24727
2007-03-31 27619
2007-06-30 29634
2007-09-30 28202
2007-12-31 35765
2008-03-31 30809
2008-06-30 38178
2008-09-30 25126
2008-12-31 19889
2009-03-31 30497
2009-06-30 31071
2009-09-30 24107
2009-12-31 20108
2010-03-31 19575
2010-06-30 20184
2010-09-30 31826
2010-12-31 25931
2011-03-31 25881
2011-06-30 25536
2011-09-30 26096
2011-12-31 19316
2012-03-31 27071
2012-06-30 22493
2012-09-30 25731
2012-12-31 19389
2013-03-31 19275
2013-06-30 19904
2013-09-30 23036
2013-12-31 20809
2014-03-31 18596
2014-06-30 16430
2014-09-30 12069
2014-12-31 11599
2015-03-31 14556
2015-06-30 13381
2015-09-30 13035
2015-12-31 9382
2016-03-31 10823
2016-06-30 10991
2016-09-30 12885
2016-12-31 12253
2017-03-31 10193
2017-06-30 11565
2017-09-30 12488
2017-12-31 13950
2018-03-31 13615
2018-06-30 10235
2018-09-30 8074
2018-12-31 6220
2019-03-31 5669
2019-06-30 6631
2019-09-30 6953
2019-12-31 6138
2020-03-31 7200
2020-06-30 5295
2020-09-30 4791
2020-12-31 7181
2021-03-31 5767
2021-06-30 5152
2021-09-30 5509
2021-12-31 8162
2022-03-31 7047
2022-06-30 7041
2022-09-30 4761
2022-12-31 7979
2023-03-31 8358
2023-06-30 7029
2023-09-30 8476