Quarter	US dollars
1999-09-30	49666
1999-12-31	50985
2000-03-31	51946
2000-06-30	52352
2000-09-30	55989
2000-12-31	56287
2001-03-31	54977
2001-06-30	55112
2001-09-30	55953
2001-12-31	56955
2002-03-31	59560
2002-06-30	63415
2002-09-30	65811
2002-12-31	65814
2003-03-31	71483
2003-06-30	71927
2003-09-30	78388
2003-12-31	81305
2004-03-31	95025
2004-06-30	86523
2004-09-30	97322
2004-12-31	102461
2005-03-31	116719
2005-06-30	145581
2005-09-30	175092
2005-12-31	168693
2006-03-31	184468
2006-06-30	196134
2006-09-30	207693
2006-12-31	212397
2007-03-31	228741
2007-06-30	247596
2007-09-30	277575
2007-12-31	296429
2008-03-31	331362
2008-06-30	320973
2008-09-30	308300
2008-12-31	274032
2009-03-31	260629
2009-06-30	269670
2009-09-30	289033
2009-12-31	301423
2010-03-31	337872
2010-06-30	369600
2010-09-30	401760
2010-12-31	419045
2011-03-31	453213
2011-06-30	496962
2011-09-30	485534
2011-12-31	473924
2012-03-31	484156
2012-06-30	477189
2012-09-30	470475
2012-12-31	479996
2013-03-31	508164
2013-06-30	505994
2013-09-30	518674
2013-12-31	518568
2014-03-31	542761
2014-06-30	535326
2014-09-30	529145
2014-12-31	506575
2015-03-31	494911
2015-06-30	469449
2015-09-30	434195
2015-12-31	407075
2016-03-31	411290
2016-06-30	404105
2016-09-30	412169
2016-12-31	393707
2017-03-31	419730
2017-06-30	476730
2017-09-30	479952
2017-12-31	503402
2018-03-31	509928
2018-06-30	492613
2018-09-30	482023
2018-12-31	488741
2019-03-31	504195
2019-06-30	511802
2019-09-30	494590
2019-12-31	501219
2020-03-31	508352
2020-06-30	499802
2020-09-30	496676
2020-12-31	547311
2021-03-31	562926
2021-06-30	580489
2021-09-30	572605
2021-12-31	591756
2022-03-31	577421
2022-06-30	558691
2022-09-30	538752
2022-12-31	550827
2023-03-31	562234
2023-06-30	554019
2023-09-30	556851