Quarter	US dollars
1999-09-30	588
1999-12-31	492
2000-03-31	407
2000-06-30	600
2000-09-30	650
2000-12-31	994
2001-03-31	958
2001-06-30	882
2001-09-30	1073
2001-12-31	959
2002-03-31	776
2002-06-30	1265
2002-09-30	1340
2002-12-31	1598
2003-03-31	1641
2003-06-30	1888
2003-09-30	1680
2003-12-31	1894
2004-03-31	1888
2004-06-30	1551
2004-09-30	1650
2004-12-31	2454
2005-03-31	2136
2005-06-30	2696
2005-09-30	2575
2005-12-31	2431
2006-03-31	2182
2006-06-30	2704
2006-09-30	2984
2006-12-31	2290
2007-03-31	4350
2007-06-30	3955
2007-09-30	3761
2007-12-31	5148
2008-03-31	6926
2008-06-30	5459
2008-09-30	6799
2008-12-31	12233
2009-03-31	9565
2009-06-30	7211
2009-09-30	7306
2009-12-31	6175
2010-03-31	6460
2010-06-30	9636
2010-09-30	7977
2010-12-31	9658
2011-03-31	5203
2011-06-30	6660
2011-09-30	10773
2011-12-31	10265
2012-03-31	9438
2012-06-30	10055
2012-09-30	8385
2012-12-31	18260
2013-03-31	16540
2013-06-30	16561
2013-09-30	7318
2013-12-31	5780
2014-03-31	4752
2014-06-30	7598
2014-09-30	7911
2014-12-31	8294
2015-03-31	5862
2015-06-30	3832
2015-09-30	4029
2015-12-31	3564
2016-03-31	5681
2016-06-30	7626
2016-09-30	4560
2016-12-31	3002
2017-03-31	2202
2017-06-30	2298
2017-09-30	2811
2017-12-31	2778
2018-03-31	2859
2018-06-30	1349
2018-09-30	1711
2018-12-31	2268
2019-03-31	3138
2019-06-30	3776
2019-09-30	3629
2019-12-31	3361
2020-03-31	5466
2020-06-30	5140
2020-09-30	5594
2020-12-31	6759
2021-03-31	6092
2021-06-30	5284
2021-09-30	4543
2021-12-31	4081
2022-03-31	2935
2022-06-30	3293
2022-09-30	3957
2022-12-31	3082
2023-03-31	2856
2023-06-30	3112
2023-09-30	3480