Quarter	US dollars
1999-09-30	38006
1999-12-31	34164
2000-03-31	37399
2000-06-30	35253
2000-09-30	34987
2000-12-31	82146
2001-03-31	78359
2001-06-30	78357
2001-09-30	79968
2001-12-31	77606
2002-03-31	73076
2002-06-30	83676
2002-09-30	84472
2002-12-31	81260
2003-03-31	91432
2003-06-30	99899
2003-09-30	101869
2003-12-31	98843
2004-03-31	107938
2004-06-30	111849
2004-09-30	116728
2004-12-31	109356
2005-03-31	128990
2005-06-30	107247
2005-09-30	111305
2005-12-31	111752
2006-03-31	144189
2006-06-30	157112
2006-09-30	172293
2006-12-31	176212
2007-03-31	212179
2007-06-30	250668
2007-09-30	278808
2007-12-31	262078
2008-03-31	307446
2008-06-30	258928
2008-09-30	250205
2008-12-31	218729
2009-03-31	216302
2009-06-30	250269
2009-09-30	263501
2009-12-31	239166
2010-03-31	285740
2010-06-30	257106
2010-09-30	277726
2010-12-31	256902
2011-03-31	279693
2011-06-30	291588
2011-09-30	267770
2011-12-31	292180
2012-03-31	242619
2012-06-30	246444
2012-09-30	215848
2012-12-31	208254
2013-03-31	226859
2013-06-30	226442
2013-09-30	224470
2013-12-31	206532
2014-03-31	210425
2014-06-30	206663
2014-09-30	196108
2014-12-31	175585
2015-03-31	170472
2015-06-30	172020
2015-09-30	164628
2015-12-31	146114
2016-03-31	155280
2016-06-30	144499
2016-09-30	139734
2016-12-31	130941
2017-03-31	160814
2017-06-30	207357
2017-09-30	210831
2017-12-31	225598
2018-03-31	213836
2018-06-30	191079
2018-09-30	219432
2018-12-31	242971
2019-03-31	270775
2019-06-30	283465
2019-09-30	264284
2019-12-31	249875
2020-03-31	293088
2020-06-30	300643
2020-09-30	343559
2020-12-31	362093
2021-03-31	383111
2021-06-30	395240
2021-09-30	377765
2021-12-31	351743
2022-03-31	404641
2022-06-30	379767
2022-09-30	374222
2022-12-31	403190
2023-03-31	400379
2023-06-30	411597
2023-09-30	405129