Quarter	US dollars
1999-09-30	20554
1999-12-31	21749
2000-03-31	20854
2000-06-30	23005
2000-09-30	24981
2000-12-31	29695
2001-03-31	27290
2001-06-30	25943
2001-09-30	26478
2001-12-31	25057
2002-03-31	26339
2002-06-30	27605
2002-09-30	25760
2002-12-31	27548
2003-03-31	26590
2003-06-30	27328
2003-09-30	28008
2003-12-31	29332
2004-03-31	29126
2004-06-30	30186
2004-09-30	31635
2004-12-31	35079
2005-03-31	34682
2005-06-30	34974
2005-09-30	34306
2005-12-31	34732
2006-03-31	35384
2006-06-30	35521
2006-09-30	37121
2006-12-31	39220
2007-03-31	39194
2007-06-30	40355
2007-09-30	38647
2007-12-31	43740
2008-03-31	43287
2008-06-30	40664
2008-09-30	36261
2008-12-31	39875
2009-03-31	36554
2009-06-30	38440
2009-09-30	36334
2009-12-31	34995
2010-03-31	35478
2010-06-30	38289
2010-09-30	41392
2010-12-31	42856
2011-03-31	46111
2011-06-30	49271
2011-09-30	48525
2011-12-31	49092
2012-03-31	51134
2012-06-30	53046
2012-09-30	56836
2012-12-31	59377
2013-03-31	58716
2013-06-30	62092
2013-09-30	65517
2013-12-31	65762
2014-03-31	66857
2014-06-30	72947
2014-09-30	68835
2014-12-31	71819
2015-03-31	84887
2015-06-30	89478
2015-09-30	94221
2015-12-31	94814
2016-03-31	103645
2016-06-30	104166
2016-09-30	104870
2016-12-31	98940
2017-03-31	102875
2017-06-30	109695
2017-09-30	109633
2017-12-31	107817
2018-03-31	109623
2018-06-30	111678
2018-09-30	110817
2018-12-31	107566
2019-03-31	109681
2019-06-30	114443
2019-09-30	112742
2019-12-31	114520
2020-03-31	124389
2020-06-30	126711
2020-09-30	119273
2020-12-31	120410
2021-03-31	119395
2021-06-30	117197
2021-09-30	115266
2021-12-31	108369
2022-03-31	110605
2022-06-30	97304
2022-09-30	89757
2022-12-31	95267
2023-03-31	96490
2023-06-30	96664
2023-09-30	94021
2023-12-31	100783