Quarter	US dollars
1999-03-31	70481
1999-06-30	71264
1999-09-30	81392
1999-12-31	100735
2000-03-31	104039
2000-06-30	111653
2000-09-30	116101
2000-12-31	157998
2001-03-31	128780
2001-06-30	103729
2001-09-30	115341
2001-12-31	125636
2002-03-31	110466
2002-06-30	119897
2002-09-30	115124
2002-12-31	132291
2003-03-31	131079
2003-06-30	145671
2003-09-30	136411
2003-12-31	174560
2004-03-31	196240
2004-06-30	190583
2004-09-30	144843
2004-12-31	151145
2005-03-31	157754
2005-06-30	170147
2005-09-30	162593
2005-12-31	145654
2006-03-31	165296
2006-06-30	192132
2006-09-30	171555
2006-12-31	129149
2007-03-31	246388
2007-06-30	180023
2007-09-30	200344
2007-12-31	326013
2008-03-31	297542
2008-06-30	200154
2008-09-30	208198
2008-12-31	166879
2009-03-31	166679
2009-06-30	207226
2009-09-30	160979
2009-12-31	150598
2010-03-31	160764
2010-06-30	164952
2010-09-30	164953
2010-12-31	171079
2011-03-31	113677
2011-06-30	127318
2011-09-30	172081
2011-12-31	220374
2012-03-31	191523
2012-06-30	200720
2012-09-30	216389
2012-12-31	193178
2013-03-31	199598
2013-06-30	160852
2013-09-30	163690
2013-12-31	176232
2014-03-31	159949
2014-06-30	148639
2014-09-30	163232
2014-12-31	151102
2015-03-31	166103
2015-06-30	162631
2015-09-30	160719
2015-12-31	163794
2016-03-31	138325
2016-06-30	155879
2016-09-30	169846
2016-12-31	183786
2017-03-31	167083
2017-06-30	172036
2017-09-30	162669
2017-12-31	166552
2018-03-31	160266
2018-06-30	200296
2018-09-30	163813
2018-12-31	185350
2019-03-31	167846
2019-06-30	152170
2019-09-30	174810
2019-12-31	195419
2020-03-31	163152
2020-06-30	185878
2020-09-30	201837
2020-12-31	195592
2021-03-31	190399
2021-06-30	185031
2021-09-30	172654
2021-12-31	201590
2022-03-31	198187
2022-06-30	194855
2022-09-30	174392
2022-12-31	203973
2023-03-31	175161
2023-06-30	188037
2023-09-30	192844