Quarter	US dollars
1999-09-30	570
1999-12-31	619
2000-03-31	670
2000-06-30	748
2000-09-30	803
2000-12-31	846
2001-03-31	847
2001-06-30	875
2001-09-30	1120
2001-12-31	1172
2002-03-31	1171
2002-06-30	1157
2002-09-30	1025
2002-12-31	1286
2003-03-31	1280
2003-06-30	827
2003-09-30	829
2003-12-31	990
2004-03-31	1242
2004-06-30	1030
2004-09-30	1220
2004-12-31	1066
2005-03-31	1440
2005-06-30	1346
2005-09-30	1212
2005-12-31	1351
2006-03-31	1728
2006-06-30	1679
2006-09-30	1689
2006-12-31	1859
2007-03-31	3254
2007-06-30	3258
2007-09-30	3606
2007-12-31	4018
2008-03-31	3854
2008-06-30	3716
2008-09-30	3632
2008-12-31	2527
2009-03-31	2345
2009-06-30	2567
2009-09-30	2781
2009-12-31	2803
2010-03-31	3091
2010-06-30	2478
2010-09-30	3067
2010-12-31	3261
2011-03-31	3374
2011-06-30	2392
2011-09-30	3790
2011-12-31	2540
2012-03-31	3129
2012-06-30	2751
2012-09-30	2480
2012-12-31	2915
2013-03-31	2206
2013-06-30	2267
2013-09-30	2410
2013-12-31	2254
2014-03-31	2264
2014-06-30	2465
2014-09-30	2553
2014-12-31	2822
2015-03-31	2650
2015-06-30	2702
2015-09-30	3084
2015-12-31	3016
2016-03-31	2838
2016-06-30	2517
2016-09-30	2861
2016-12-31	3463
2017-03-31	3716
2017-06-30	3512
2017-09-30	4133
2017-12-31	4974
2018-03-31	3320
2018-06-30	3156
2018-09-30	3844
2018-12-31	3045
2019-03-31	3672
2019-06-30	3354
2019-09-30	3240
2019-12-31	3264
2020-03-31	3216
2020-06-30	2739
2020-09-30	2426
2020-12-31	3580
2021-03-31	3293
2021-06-30	2750
2021-09-30	3097
2021-12-31	3586
2022-03-31	3639
2022-06-30	3814
2022-09-30	4076
2022-12-31	3362
2023-03-31	4388
2023-06-30	3838
2023-09-30	3550