Quarter	US dollars
1999-09-30	1601
1999-12-31	1093
2000-03-31	1125
2000-06-30	1151
2000-09-30	1159
2000-12-31	2154
2001-03-31	2098
2001-06-30	2011
2001-09-30	2152
2001-12-31	1831
2002-03-31	1807
2002-06-30	1900
2002-09-30	2068
2002-12-31	2096
2003-03-31	1922
2003-06-30	2059
2003-09-30	2029
2003-12-31	2029
2004-03-31	2211
2004-06-30	2356
2004-09-30	2276
2004-12-31	2375
2005-03-31	2507
2005-06-30	2701
2005-09-30	3095
2005-12-31	3368
2006-03-31	4189
2006-06-30	4653
2006-09-30	4741
2006-12-31	5345
2007-03-31	5547
2007-06-30	6352
2007-09-30	6679
2007-12-31	7643
2008-03-31	9186
2008-06-30	9604
2008-09-30	9390
2008-12-31	8444
2009-03-31	8548
2009-06-30	8621
2009-09-30	9303
2009-12-31	9569
2010-03-31	10085
2010-06-30	10409
2010-09-30	10655
2010-12-31	10736
2011-03-31	9871
2011-06-30	9834
2011-09-30	10044
2011-12-31	9377
2012-03-31	9894
2012-06-30	10011
2012-09-30	10329
2012-12-31	9877
2013-03-31	10467
2013-06-30	9076
2013-09-30	9553
2013-12-31	9861
2014-03-31	9829
2014-06-30	9491
2014-09-30	9479
2014-12-31	10607
2015-03-31	10130
2015-06-30	9909
2015-09-30	10535
2015-12-31	10594
2016-03-31	9777
2016-06-30	10264
2016-09-30	10368
2016-12-31	6957
2017-03-31	7477
2017-06-30	7324
2017-09-30	7361
2017-12-31	7805
2018-03-31	8406
2018-06-30	7942
2018-09-30	7951
2018-12-31	7901
2019-03-31	9595
2019-06-30	9193
2019-09-30	8970
2019-12-31	9921
2020-03-31	9888
2020-06-30	9451
2020-09-30	11150
2020-12-31	11733
2021-03-31	11889
2021-06-30	12603
2021-09-30	13119
2021-12-31	12434
2022-03-31	10813
2022-06-30	10418
2022-09-30	10957
2022-12-31	10529
2023-03-31	9880
2023-06-30	8674
2023-09-30	9554