Quarter	US dollars
2004-12-31	5197
2005-03-31	5785
2005-06-30	5865
2005-09-30	6767
2005-12-31	15302
2006-03-31	16360
2006-06-30	19045
2006-09-30	20102
2006-12-31	19660
2007-03-31	21170
2007-06-30	22658
2007-09-30	24331
2007-12-31	24831
2008-03-31	34129
2008-06-30	33981
2008-09-30	29250
2008-12-31	21367
2009-03-31	22024
2009-06-30	22396
2009-09-30	19950
2009-12-31	20658
2010-03-31	21461
2010-06-30	20805
2010-09-30	21610
2010-12-31	19459
2011-03-31	21237
2011-06-30	21290
2011-09-30	25051
2011-12-31	22238
2012-03-31	22933
2012-06-30	22340
2012-09-30	23905
2012-12-31	22946
2013-03-31	22120
2013-06-30	21771
2013-09-30	23047
2013-12-31	20158
2014-03-31	20856
2014-06-30	22794
2014-09-30	24026
2014-12-31	20815
2015-03-31	19151
2015-06-30	17738
2015-09-30	15885
2015-12-31	14693
2016-03-31	14119
2016-06-30	12207
2016-09-30	12706
2016-12-31	9863
2017-03-31	10515
2017-06-30	9661
2017-09-30	7878
2017-12-31	9230
2018-03-31	9373
2018-06-30	9262
2018-09-30	10553
2018-12-31	11126
2019-03-31	10251
2019-06-30	13171
2019-09-30	12602
2019-12-31	12437
2020-03-31	15000
2020-06-30	11425
2020-09-30	11630
2020-12-31	13500
2021-03-31	13396
2021-06-30	12831
2021-09-30	12583
2021-12-31	16447
2022-03-31	12770
2022-06-30	12453
2022-09-30	13435
2022-12-31	13324
2023-03-31	14943
2023-06-30	17189
2023-09-30	13162