Quarter	US dollars
1999-03-31	927
1999-06-30	1050
1999-09-30	1116
1999-12-31	1020
2000-03-31	1088
2000-06-30	1052
2000-09-30	967
2000-12-31	1376
2001-03-31	1364
2001-06-30	1552
2001-09-30	433
2001-12-31	354
2002-03-31	852
2002-06-30	1039
2002-09-30	1541
2002-12-31	1062
2003-03-31	1519
2003-06-30	1422
2003-09-30	2097
2003-12-31	1748
2004-03-31	2598
2004-06-30	2045
2004-09-30	2833
2004-12-31	2288
2005-03-31	2993
2005-06-30	2404
2005-09-30	2283
2005-12-31	1244
2006-03-31	2624
2006-06-30	3155
2006-09-30	2917
2006-12-31	2427
2007-03-31	3160
2007-06-30	3079
2007-09-30	2640
2007-12-31	2251
2008-03-31	2762
2008-06-30	4109
2008-09-30	2623
2008-12-31	1840
2009-03-31	1596
2009-06-30	1437
2009-09-30	1327
2009-12-31	1644
2010-03-31	1449
2010-06-30	1360
2010-09-30	1608
2010-12-31	1718
2011-03-31	2644
2011-06-30	2973
2011-09-30	3045
2011-12-31	3464
2012-03-31	1478
2012-06-30	2321
2012-09-30	2176
2012-12-31	2281
2013-03-31	2872
2013-06-30	3224
2013-09-30	3286
2013-12-31	4308
2014-03-31	6104
2014-06-30	6534
2014-09-30	7068
2014-12-31	5442
2015-03-31	5421
2015-06-30	5098
2015-09-30	3665
2015-12-31	2707
2016-03-31	2912
2016-06-30	3229
2016-09-30	2095
2016-12-31	2243
2017-03-31	2723
2017-06-30	3439
2017-09-30	2733
2017-12-31	2819
2018-03-31	3265
2018-06-30	3422
2018-09-30	3260
2018-12-31	2488
2019-03-31	3023
2019-06-30	2442
2019-09-30	3049
2019-12-31	3378
2020-03-31	3960
2020-06-30	3525
2020-09-30	3941
2020-12-31	4843
2021-03-31	4127
2021-06-30	2861
2021-09-30	3219
2021-12-31	3414
2022-03-31	3586
2022-06-30	4262
2022-09-30	3280
2022-12-31	2991
2023-03-31	3505
2023-06-30	4264
2023-09-30	4742