Quarter	US dollars
2004-12-31	1094
2005-03-31	1008
2005-06-30	1280
2005-09-30	1889
2005-12-31	1917
2006-03-31	1179
2006-06-30	1246
2006-09-30	1246
2006-12-31	1550
2007-03-31	3181
2007-06-30	3274
2007-09-30	3119
2007-12-31	2851
2008-03-31	1809
2008-06-30	2199
2008-09-30	1951
2008-12-31	1893
2009-03-31	1215
2009-06-30	1250
2009-09-30	1126
2009-12-31	1335
2010-03-31	1527
2010-06-30	1529
2010-09-30	1720
2010-12-31	1836
2011-03-31	2262
2011-06-30	3165
2011-09-30	2923
2011-12-31	3010
2012-03-31	1871
2012-06-30	1625
2012-09-30	2647
2012-12-31	2904
2013-03-31	2525
2013-06-30	2528
2013-09-30	2727
2013-12-31	2993
2014-03-31	3165
2014-06-30	2857
2014-09-30	2647
2014-12-31	2877
2015-03-31	2710
2015-06-30	2880
2015-09-30	2804
2015-12-31	2630
2016-03-31	2372
2016-06-30	2342
2016-09-30	2310
2016-12-31	2270
2017-03-31	2251
2017-06-30	2425
2017-09-30	2599
2017-12-31	3148
2018-03-31	3090
2018-06-30	3340
2018-09-30	3139
2018-12-31	3114
2019-03-31	3536
2019-06-30	3756
2019-09-30	3469
2019-12-31	3654
2020-03-31	4454
2020-06-30	3370
2020-09-30	3442
2020-12-31	3901
2021-03-31	3921
2021-06-30	3469
2021-09-30	3247
2021-12-31	3106
2022-03-31	3056
2022-06-30	2967
2022-09-30	2773
2022-12-31	2724
2023-03-31	2563
2023-06-30	2316
2023-09-30	2621