Quarterly US dollars
1999-03-31 7454
1999-06-30 5423
1999-09-30 6997
1999-12-31 7185
2000-03-31 6830
2000-06-30 8064
2000-09-30 7845
2000-12-31 7772
2001-03-31 8878
2001-06-30 10848
2001-09-30 12664
2001-12-31 12255
2002-03-31 11264
2002-06-30 11259
2002-09-30 14118
2002-12-31 12715
2003-03-31 15760
2003-06-30 14592
2003-09-30 15538
2003-12-31 14309
2004-03-31 15920
2004-06-30 16900
2004-09-30 14195
2004-12-31 18067
2005-03-31 18946
2005-06-30 14911
2005-09-30 18001
2005-12-31 12158
2006-03-31 18552
2006-06-30 17336
2006-09-30 21817
2006-12-31 19178
2007-03-31 22788
2007-06-30 29693
2007-09-30 22788
2007-12-31 21910
2008-03-31 27952
2008-06-30 26666
2008-09-30 17910
2008-12-31 15218
2009-03-31 20373
2009-06-30 19573
2009-09-30 21281
2009-12-31 14862
2010-03-31 15384
2010-06-30 15915
2010-09-30 13637
2010-12-31 12575
2011-03-31 14233
2011-06-30 14457
2011-09-30 17379
2011-12-31 13386
2012-03-31 14271
2012-06-30 13333
2012-09-30 12461
2012-12-31 12339
2013-03-31 11241
2013-06-30 10667
2013-09-30 12224
2013-12-31 10168
2014-03-31 10188
2014-06-30 10890
2014-09-30 10386
2014-12-31 9555
2015-03-31 9710
2015-06-30 7051
2015-09-30 7130
2015-12-31 5723
2016-03-31 8190
2016-06-30 7435
2016-09-30 7235
2016-12-31 5627
2017-03-31 5864
2017-06-30 5851
2017-09-30 6025
2017-12-31 5516
2018-03-31 6378
2018-06-30 6824
2018-09-30 5674
2018-12-31 5652
2019-03-31 6463
2019-06-30 5968
2019-09-30 5487
2019-12-31 4548
2020-03-31 5034
2020-06-30 4459
2020-09-30 5149
2020-12-31 5042
2021-03-31 4763
2021-06-30 5349
2021-09-30 3671
2021-12-31 3342
2022-03-31 4159
2022-06-30 3499
2022-09-30 3617
2022-12-31 2822
2023-03-31 2583
2023-06-30 2410
2023-09-30 3104