Quarter	US dollars
1999-09-30	1210
1999-12-31	1183
2000-03-31	1144
2000-06-30	1048
2000-09-30	1036
2000-12-31	1133
2001-03-31	1126
2001-06-30	1086
2001-09-30	1107
2001-12-31	1220
2002-03-31	1262
2002-06-30	1286
2002-09-30	1150
2002-12-31	1284
2003-03-31	1369
2003-06-30	1365
2003-09-30	1440
2003-12-31	1422
2004-03-31	1575
2004-06-30	1547
2004-09-30	1589
2004-12-31	1605
2005-03-31	1947
2005-06-30	2056
2005-09-30	2080
2005-12-31	2130
2006-03-31	1946
2006-06-30	1938
2006-09-30	1911
2006-12-31	2323
2007-03-31	2461
2007-06-30	2618
2007-09-30	3079
2007-12-31	3066
2008-03-31	5169
2008-06-30	3596
2008-09-30	3762
2008-12-31	3508
2009-03-31	3899
2009-06-30	3695
2009-09-30	3578
2009-12-31	3570
2010-03-31	3733
2010-06-30	3736
2010-09-30	3973
2010-12-31	3972
2011-03-31	3836
2011-06-30	3953
2011-09-30	4065
2011-12-31	4171
2012-03-31	4388
2012-06-30	7388
2012-09-30	7987
2012-12-31	7266
2013-03-31	7943
2013-06-30	7790
2013-09-30	7218
2013-12-31	7104
2014-03-31	7184
2014-06-30	7223
2014-09-30	6697
2014-12-31	6833
2015-03-31	7312
2015-06-30	7507
2015-09-30	6693
2015-12-31	6051
2016-03-31	6006
2016-06-30	6298
2016-09-30	6112
2016-12-31	6107
2017-03-31	5915
2017-06-30	6870
2017-09-30	7050
2017-12-31	7451
2018-03-31	7146
2018-06-30	7056
2018-09-30	6604
2018-12-31	6796
2019-03-31	6510
2019-06-30	7089
2019-09-30	7492
2019-12-31	7587
2020-03-31	7160
2020-06-30	7205
2020-09-30	7580
2020-12-31	7450
2021-03-31	7773
2021-06-30	7641
2021-09-30	7795
2021-12-31	7771
2022-03-31	7685
2022-06-30	7458
2022-09-30	7468
2022-12-31	6297
2023-03-31	6994
2023-06-30	6677
2023-09-30	2335