Quarterly US dollars
1999-09-30 11500
1999-12-31 8420
2000-03-31 9500
2000-06-30 10250
2000-09-30 8828
2000-12-31 9522
2001-03-31 9466
2001-06-30 10112
2001-09-30 9863
2001-12-31 10702
2002-03-31 12090
2002-06-30 13524
2002-09-30 14717
2002-12-31 16267
2003-03-31 17691
2003-06-30 19609
2003-09-30 18864
2003-12-31 21447
2004-03-31 20754
2004-06-30 22680
2004-09-30 25358
2004-12-31 26931
2005-03-31 30026
2005-06-30 32059
2005-09-30 31869
2005-12-31 31064
2006-03-31 31062
2006-06-30 30532
2006-09-30 31187
2006-12-31 32433
2007-03-31 30732
2007-06-30 42691
2007-09-30 35867
2007-12-31 40077
2008-03-31 40582
2008-06-30 26069
2008-09-30 58972
2008-12-31 50172
2009-03-31 33883
2009-06-30 26747
2009-09-30 22150
2009-12-31 19126
2010-03-31 26267
2010-06-30 25854
2010-09-30 24779
2010-12-31 28698
2011-03-31 28846
2011-06-30 23397
2011-09-30 29139
2011-12-31 28386
2012-03-31 27021
2012-06-30 27814
2012-09-30 27642
2012-12-31 29095
2013-03-31 25683
2013-06-30 24685
2013-09-30 25186
2013-12-31 24125
2014-03-31 25752
2014-06-30 27413
2014-09-30 26950
2014-12-31 26501
2015-03-31 28155
2015-06-30 26605
2015-09-30 26985
2015-12-31 25393
2016-03-31 25485
2016-06-30 25125
2016-09-30 25550
2016-12-31 21962
2017-03-31 19952
2017-06-30 22019
2017-09-30 24877
2017-12-31 25642
2018-03-31 26721
2018-06-30 24867
2018-09-30 20711
2018-12-31 20787
2019-03-31 19201
2019-06-30 21652
2019-09-30 23930
2019-12-31 25593
2020-03-31 22230
2020-06-30 29751
2020-09-30 34552
2020-12-31 36450
2021-03-31 34166
2021-06-30 27187
2021-09-30 27774
2021-12-31 35483
2022-03-31 30964
2022-06-30 26467
2022-09-30 20672
2022-12-31 22597
2023-03-31 24548
2023-06-30 22541
2023-09-30 21705
2023-12-31 23578