Quarter	US dollars
1999-03-31	7616
1999-06-30	6720
1999-09-30	8682
1999-12-31	10321
2000-03-31	10110
2000-06-30	10509
2000-09-30	11249
2000-12-31	12367
2001-03-31	12268
2001-06-30	12579
2001-09-30	14180
2001-12-31	15985
2002-03-31	19895
2002-06-30	18809
2002-09-30	20961
2002-12-31	19980
2003-03-31	20565
2003-06-30	24435
2003-09-30	26124
2003-12-31	26534
2004-03-31	18830
2004-06-30	19195
2004-09-30	19740
2004-12-31	19571
2005-03-31	16754
2005-06-30	15980
2005-09-30	19227
2005-12-31	17758
2006-03-31	21654
2006-06-30	20185
2006-09-30	20683
2006-12-31	18611
2007-03-31	21509
2007-06-30	22932
2007-09-30	22915
2007-12-31	22834
2008-03-31	22913
2008-06-30	20576
2008-09-30	14684
2008-12-31	16146
2009-03-31	18583
2009-06-30	19636
2009-09-30	20850
2009-12-31	18690
2010-03-31	21921
2010-06-30	26474
2010-09-30	26741
2010-12-31	18897
2011-03-31	23676
2011-06-30	26839
2011-09-30	32285
2011-12-31	29995
2012-03-31	37408
2012-06-30	38287
2012-09-30	44162
2012-12-31	46871
2013-03-31	51331
2013-06-30	51164
2013-09-30	52920
2013-12-31	47702
2014-03-31	0
2014-06-30	278
2014-09-30	207
2014-12-31	290
2015-03-31	580
2015-06-30	372
2015-09-30	224
2015-12-31	484
2016-03-31	816
2016-06-30	977
2016-09-30	1076
2016-12-31	1103
2017-03-31	1028
2017-06-30	852
2017-09-30	701
2017-12-31	704
2018-03-31	1025
2018-06-30	780
2018-09-30	777
2018-12-31	504
2019-03-31	682
2019-06-30	634
2019-09-30	850
2019-12-31	545
2020-03-31	595
2020-06-30	711
2020-09-30	844
2020-12-31	1785
2021-03-31	2109
2021-06-30	2021
2021-09-30	2045
2021-12-31	2965
2022-03-31	2834
2022-06-30	3169
2022-09-30	3650
2022-12-31	3307
2023-03-31	3830
2023-06-30	5376
2023-09-30	3639