Quarter	US dollars
1999-03-31	166630
1999-06-30	163057
1999-09-30	164097
1999-12-31	137367
2000-03-31	156431
2000-06-30	154730
2000-09-30	143510
2000-12-31	130905
2001-03-31	137976
2001-06-30	138715
2001-09-30	141062
2001-12-31	138800
2002-03-31	147179
2002-06-30	161445
2002-09-30	166121
2002-12-31	180314
2003-03-31	210435
2003-06-30	228187
2003-09-30	236755
2003-12-31	273102
2004-03-31	298662
2004-06-30	286827
2004-09-30	304829
2004-12-31	323934
2005-03-31	340208
2005-06-30	345634
2005-09-30	349047
2005-12-31	323531
2006-03-31	341206
2006-06-30	377479
2006-09-30	377459
2006-12-31	386520
2007-03-31	443583
2007-06-30	476135
2007-09-30	476904
2007-12-31	513150
2008-03-31	582923
2008-06-30	572152
2008-09-30	507861
2008-12-31	475822
2009-03-31	507053
2009-06-30	509589
2009-09-30	480985
2009-12-31	450577
2010-03-31	476279
2010-06-30	452645
2010-09-30	515908
2010-12-31	502754
2011-03-31	522311
2011-06-30	546923
2011-09-30	552895
2011-12-31	511614
2012-03-31	537061
2012-06-30	561068
2012-09-30	558220
2012-12-31	590277
2013-03-31	571309
2013-06-30	560039
2013-09-30	555069
2013-12-31	598829
2014-03-31	554173
2014-06-30	557177
2014-09-30	533382
2014-12-31	521735
2015-03-31	513951
2015-06-30	546840
2015-09-30	535489
2015-12-31	513364
2016-03-31	523483
2016-06-30	511378
2016-09-30	520602
2016-12-31	490998
2017-03-31	480325
2017-06-30	514000
2017-09-30	534531
2017-12-31	540545
2018-03-31	552700
2018-06-30	546580
2018-09-30	556149
2018-12-31	549989
2019-03-31	526915
2019-06-30	553326
2019-09-30	554972
2019-12-31	545222
2020-03-31	562440
2020-06-30	594563
2020-09-30	612209
2020-12-31	602163
2021-03-31	573133
2021-06-30	586368
2021-09-30	571431
2021-12-31	595068
2022-03-31	591264
2022-06-30	564387
2022-09-30	550505
2022-12-31	549268
2023-03-31	516767
2023-06-30	508574
2023-09-30	486337