Quarter	US dollars
2004-12-31	4940
2005-03-31	7204
2005-06-30	7000
2005-09-30	7915
2005-12-31	7535
2006-03-31	8905
2006-06-30	9687
2006-09-30	11667
2006-12-31	12265
2007-03-31	12848
2007-06-30	14255
2007-09-30	17100
2007-12-31	17175
2008-03-31	18082
2008-06-30	19481
2008-09-30	19231
2008-12-31	15599
2009-03-31	13637
2009-06-30	14617
2009-09-30	14795
2009-12-31	14385
2010-03-31	14054
2010-06-30	15963
2010-09-30	19053
2010-12-31	27051
2011-03-31	25404
2011-06-30	25644
2011-09-30	29014
2011-12-31	28892
2012-03-31	34040
2012-06-30	34675
2012-09-30	33393
2012-12-31	43980
2013-03-31	81054
2013-06-30	85217
2013-09-30	78105
2013-12-31	69434
2014-03-31	67251
2014-06-30	60746
2014-09-30	58577
2014-12-31	51363
2015-03-31	53810
2015-06-30	58259
2015-09-30	61198
2015-12-31	59114
2016-03-31	63079
2016-06-30	65085
2016-09-30	62278
2016-12-31	57969
2017-03-31	58810
2017-06-30	52378
2017-09-30	54266
2017-12-31	54649
2018-03-31	56048
2018-06-30	58439
2018-09-30	57077
2018-12-31	60911
2019-03-31	64603
2019-06-30	69674
2019-09-30	77499
2019-12-31	76934
2020-03-31	84939
2020-06-30	82904
2020-09-30	84270
2020-12-31	75647
2021-03-31	77590
2021-06-30	70853
2021-09-30	69873
2021-12-31	66787
2022-03-31	71387
2022-06-30	69127
2022-09-30	70529
2022-12-31	70451
2023-03-31	70460
2023-06-30	64718
2023-09-30	65966