Quarter	US dollars
1999-03-31	1887
1999-06-30	1868
1999-09-30	1919
1999-12-31	1927
2000-03-31	2021
2000-06-30	1958
2000-09-30	1970
2000-12-31	2013
2001-03-31	2060
2001-06-30	2171
2001-09-30	2290
2001-12-31	2379
2002-03-31	2235
2002-06-30	2233
2002-09-30	2122
2002-12-31	2072
2003-03-31	2089
2003-06-30	2112
2003-09-30	2103
2003-12-31	2179
2004-03-31	2163
2004-06-30	2316
2004-09-30	1908
2004-12-31	2007
2005-03-31	2332
2005-06-30	2332
2005-09-30	2739
2005-12-31	2492
2006-03-31	2832
2006-06-30	2742
2006-09-30	2931
2006-12-31	3256
2007-03-31	4039
2007-06-30	4694
2007-09-30	4558
2007-12-31	3844
2008-03-31	5403
2008-06-30	4354
2008-09-30	4065
2008-12-31	3544
2009-03-31	3641
2009-06-30	3622
2009-09-30	3928
2009-12-31	4049
2010-03-31	3993
2010-06-30	4224
2010-09-30	4215
2010-12-31	3994
2011-03-31	4663
2011-06-30	4433
2011-09-30	4276
2011-12-31	4400
2012-03-31	4219
2012-06-30	4073
2012-09-30	3794
2012-12-31	3541
2013-03-31	3694
2013-06-30	3569
2013-09-30	3702
2013-12-31	3422
2014-03-31	3910
2014-06-30	4047
2014-09-30	3960
2014-12-31	4741
2015-03-31	3385
2015-06-30	3239
2015-09-30	3252
2015-12-31	2514
2016-03-31	2609
2016-06-30	2552
2016-09-30	2110
2016-12-31	2244
2017-03-31	2262
2017-06-30	3084
2017-09-30	3475
2017-12-31	3503
2018-03-31	3574
2018-06-30	3601
2018-09-30	3643
2018-12-31	3725
2019-03-31	3549
2019-06-30	3579
2019-09-30	2950
2019-12-31	2951
2020-03-31	2692
2020-06-30	2383
2020-09-30	2378
2020-12-31	2044
2021-03-31	1996
2021-06-30	2163
2021-09-30	2158
2021-12-31	1990
2022-03-31	2522
2022-06-30	2461
2022-09-30	2644
2022-12-31	2200
2023-03-31	2329
2023-06-30	1867
2023-09-30	2065