Quarterly US dollars
1999-03-31 2422
1999-06-30 2505
1999-09-30 2461
1999-12-31 2459
2000-03-31 2900
2000-06-30 2588
2000-09-30 3591
2000-12-31 3111
2001-03-31 3093
2001-06-30 3215
2001-09-30 2770
2001-12-31 3172
2002-03-31 3571
2002-06-30 3922
2002-09-30 4456
2002-12-31 5701
2003-03-31 4886
2003-06-30 5237
2003-09-30 6670
2003-12-31 6726
2004-03-31 8916
2004-06-30 10223
2004-09-30 9031
2004-12-31 11507
2005-03-31 10083
2005-06-30 9670
2005-09-30 12823
2005-12-31 17889
2006-03-31 19117
2006-06-30 18534
2006-09-30 17694
2006-12-31 17911
2007-03-31 23984
2007-06-30 33196
2007-09-30 35902
2007-12-31 36502
2008-03-31 40889
2008-06-30 41348
2008-09-30 34817
2008-12-31 27954
2009-03-31 26547
2009-06-30 23508
2009-09-30 21270
2009-12-31 20563
2010-03-31 19450
2010-06-30 17029
2010-09-30 17630
2010-12-31 15236
2011-03-31 14844
2011-06-30 15368
2011-09-30 14772
2011-12-31 19397
2012-03-31 14597
2012-06-30 18012
2012-09-30 18038
2012-12-31 21046
2013-03-31 29427
2013-06-30 25421
2013-09-30 28163
2013-12-31 27692
2014-03-31 24496
2014-06-30 25875
2014-09-30 23698
2014-12-31 17964
2015-03-31 14334
2015-06-30 14196
2015-09-30 12124
2015-12-31 11186
2016-03-31 10601
2016-06-30 10005
2016-09-30 8823
2016-12-31 7493
2017-03-31 7818
2017-06-30 6783
2017-09-30 7608
2017-12-31 7004
2018-03-31 7295
2018-06-30 6101
2018-09-30 6684
2018-12-31 6713
2019-03-31 6423
2019-06-30 7016
2019-09-30 6765
2019-12-31 6219
2020-03-31 7266
2020-06-30 8370
2020-09-30 9070
2020-12-31 8818
2021-03-31 7780
2021-06-30 7385
2021-09-30 7391
2021-12-31 6876
2022-03-31 6898
2022-06-30 5969
2022-09-30 5710
2022-12-31 5712
2023-03-31 5495
2023-06-30 5010
2023-09-30 3839