Quarterly US dollars
1997-09-30 14045
1997-12-31 15409
1998-03-31 19507
1998-06-30 21900
1998-09-30 25213
1998-12-31 25093
1999-03-31 25209
1999-06-30 26081
1999-09-30 27064
1999-12-31 26345
2000-03-31 26073
2000-06-30 25088
2000-09-30 25203
2000-12-31 27259
2001-03-31 24567
2001-06-30 24143
2001-09-30 23340
2001-12-31 19879
2002-03-31 19401
2002-06-30 21095
2002-09-30 21873
2002-12-31 21683
2003-03-31 20925
2003-06-30 22982
2003-09-30 24094
2003-12-31 26427
2004-03-31 28359
2004-06-30 29963
2004-09-30 28252
2004-12-31 33700
2005-03-31 34012
2005-06-30 32997
2005-09-30 31888
2005-12-31 32673
2006-03-31 37478
2006-06-30 40396
2006-09-30 42372
2006-12-31 48193
2007-03-31 50402
2007-06-30 57086
2007-09-30 61652
2007-12-31 55306
2008-03-31 54932
2008-06-30 56129
2008-09-30 44105
2008-12-31 39166
2009-03-31 49303
2009-06-30 56634
2009-09-30 54168
2009-12-31 53560
2010-03-31 47329
2010-06-30 47325
2010-09-30 50941
2010-12-31 51172
2011-03-31 53212
2011-06-30 52572
2011-09-30 50886
2011-12-31 49792
2012-03-31 48342
2012-06-30 44921
2012-09-30 45479
2012-12-31 45636
2013-03-31 44383
2013-06-30 41290
2013-09-30 42415
2013-12-31 39865
2014-03-31 41922
2014-06-30 43116
2014-09-30 39647
2014-12-31 37861
2015-03-31 37029
2015-06-30 39305
2015-09-30 37415
2015-12-31 36608
2016-03-31 35916
2016-06-30 34458
2016-09-30 34613
2016-12-31 29145
2017-03-31 26456
2017-06-30 24561
2017-09-30 25252
2017-12-31 25571
2018-03-31 27567
2018-06-30 25476
2018-09-30 25568
2018-12-31 21957
2019-03-31 21514
2019-06-30 20881
2019-09-30 20784
2019-12-31 20487
2020-03-31 19743
2020-06-30 19453
2020-09-30 19404
2020-12-31 20984
2021-03-31 20832
2021-06-30 20256
2021-09-30 20476
2021-12-31 20740
2022-03-31 20562
2022-06-30 19776
2022-09-30 19136
2022-12-31 20301
2023-03-31 20933
2023-06-30 21873
2023-09-30 21783