Quarter	US dollars
1999-03-31	116847
1999-06-30	98651
1999-09-30	112658
1999-12-31	85969
2000-03-31	96577
2000-06-30	94518
2000-09-30	83444
2000-12-31	92268
2001-03-31	123493
2001-06-30	118761
2001-09-30	113466
2001-12-31	113518
2002-03-31	112321
2002-06-30	103089
2002-09-30	117400
2002-12-31	117529
2003-03-31	117575
2003-06-30	133729
2003-09-30	150307
2003-12-31	155853
2004-03-31	176176
2004-06-30	179983
2004-09-30	169525
2004-12-31	194107
2005-03-31	208529
2005-06-30	221378
2005-09-30	195406
2005-12-31	199988
2006-03-31	157501
2006-06-30	152924
2006-09-30	152771
2006-12-31	180116
2007-03-31	195501
2007-06-30	219498
2007-09-30	233258
2007-12-31	247499
2008-03-31	297171
2008-06-30	265815
2008-09-30	242420
2008-12-31	271597
2009-03-31	245667
2009-06-30	249378
2009-09-30	250162
2009-12-31	253635
2010-03-31	273511
2010-06-30	262012
2010-09-30	286950
2010-12-31	277247
2011-03-31	265330
2011-06-30	264448
2011-09-30	264060
2011-12-31	221070
2012-03-31	210720
2012-06-30	202792
2012-09-30	203093
2012-12-31	196003
2013-03-31	182868
2013-06-30	174668
2013-09-30	176391
2013-12-31	179329
2014-03-31	174379
2014-06-30	170869
2014-09-30	162183
2014-12-31	158728
2015-03-31	172777
2015-06-30	184345
2015-09-30	196260
2015-12-31	153255
2016-03-31	156394
2016-06-30	137581
2016-09-30	139670
2016-12-31	134230
2017-03-31	138406
2017-06-30	136222
2017-09-30	115589
2017-12-31	103563
2018-03-31	102931
2018-06-30	115119
2018-09-30	123718
2018-12-31	111942
2019-03-31	107885
2019-06-30	105263
2019-09-30	101508
2019-12-31	106550
2020-03-31	121743
2020-06-30	111686
2020-09-30	112457
2020-12-31	109447
2021-03-31	109001
2021-06-30	103910
2021-09-30	116492
2021-12-31	115120
2022-03-31	132907
2022-06-30	122128
2022-09-30	105584
2022-12-31	112017
2023-03-31	107792
2023-06-30	97326
2023-09-30	99435