Quarter	US dollars
1999-03-31	41855
1999-06-30	40604
1999-09-30	43935
1999-12-31	41882
2000-03-31	44259
2000-06-30	43930
2000-09-30	43867
2000-12-31	45942
2001-03-31	47135
2001-06-30	48462
2001-09-30	48617
2001-12-31	47105
2002-03-31	47884
2002-06-30	48278
2002-09-30	48037
2002-12-31	45087
2003-03-31	48255
2003-06-30	46206
2003-09-30	47479
2003-12-31	51268
2004-03-31	53534
2004-06-30	52199
2004-09-30	57447
2004-12-31	59485
2005-03-31	60529
2005-06-30	61870
2005-09-30	68573
2005-12-31	68787
2006-03-31	74410
2006-06-30	75180
2006-09-30	88778
2006-12-31	89197
2007-03-31	94974
2007-06-30	97176
2007-09-30	110207
2007-12-31	114426
2008-03-31	106679
2008-06-30	116014
2008-09-30	107886
2008-12-31	85600
2009-03-31	81446
2009-06-30	88537
2009-09-30	81155
2009-12-31	81762
2010-03-31	86005
2010-06-30	95015
2010-09-30	100647
2010-12-31	97330
2011-03-31	116947
2011-06-30	113332
2011-09-30	113371
2011-12-31	118658
2012-03-31	135054
2012-06-30	132904
2012-09-30	125466
2012-12-31	114238
2013-03-31	114471
2013-06-30	111322
2013-09-30	117016
2013-12-31	101728
2014-03-31	115676
2014-06-30	119674
2014-09-30	120438
2014-12-31	115675
2015-03-31	118180
2015-06-30	118115
2015-09-30	123317
2015-12-31	117253
2016-03-31	114524
2016-06-30	118371
2016-09-30	127173
2016-12-31	114956
2017-03-31	128674
2017-06-30	134216
2017-09-30	140940
2017-12-31	137181
2018-03-31	154237
2018-06-30	133710
2018-09-30	138960
2018-12-31	139230
2019-03-31	151140
2019-06-30	159781
2019-09-30	172051
2019-12-31	164839
2020-03-31	191420
2020-06-30	160415
2020-09-30	166529
2020-12-31	167049
2021-03-31	165868
2021-06-30	171043
2021-09-30	186122
2021-12-31	183663
2022-03-31	197285
2022-06-30	187621
2022-09-30	209833
2022-12-31	205703
2023-03-31	217158
2023-06-30	210659
2023-09-30	206150