Quarter	Sterling
1997-09-30	7545
1997-12-31	8247
1998-03-31	8192
1998-06-30	8469
1998-09-30	8358
1998-12-31	8664
1999-03-31	8372
1999-06-30	8238
1999-09-30	7911
1999-12-31	9218
2000-03-31	9191
2000-06-30	9013
2000-09-30	8992
2000-12-31	8745
2001-03-31	9192
2001-06-30	9250
2001-09-30	9306
2001-12-31	8896
2002-03-31	8877
2002-06-30	9144
2002-09-30	9005
2002-12-31	9018
2003-03-31	8378
2003-06-30	8211
2003-09-30	7837
2003-12-31	8560
2004-03-31	9090
2004-06-30	8734
2004-09-30	9943
2004-12-31	9634
2005-03-31	9889
2005-06-30	9286
2005-09-30	9241
2005-12-31	9293
2006-03-31	10022
2006-06-30	9640
2006-09-30	9583
2006-12-31	10120
2007-03-31	10743
2007-06-30	9924
2007-09-30	9714
2007-12-31	9429
2008-03-31	10221
2008-06-30	10295
2008-09-30	10404
2008-12-31	9929
2009-03-31	9024
2009-06-30	8543
2009-09-30	8358
2009-12-31	11260
2010-03-31	11475
2010-06-30	11379
2010-09-30	11276
2010-12-31	11029
2011-03-31	10862
2011-06-30	10680
2011-09-30	10660
2011-12-31	10270
2012-03-31	10764
2012-06-30	10191
2012-09-30	10358
2012-12-31	9926
2013-03-31	10356
2013-06-30	11090
2013-09-30	9358
2013-12-31	9345
2014-03-31	9824
2014-06-30	10256
2014-09-30	10056
2014-12-31	10426
2015-03-31	11121
2015-06-30	11250
2015-09-30	11899
2015-12-31	12138
2016-03-31	13288
2016-06-30	12947
2016-09-30	11970
2016-12-31	12058
2017-03-31	12842
2017-06-30	13086
2017-09-30	13011
2017-12-31	12623
2018-03-31	12499
2018-06-30	12291
2018-09-30	11633
2018-12-31	12411
2019-03-31	12901
2019-06-30	10385
2019-09-30	10365
2019-12-31	10354
2020-03-31	10616
2020-06-30	11983
2020-09-30	10121
2020-12-31	10711
2021-03-31	10674
2021-06-30	9415
2021-09-30	8419
2021-12-31	8493
2022-03-31	8834
2022-06-30	8558
2022-09-30	8995
2022-12-31	9686
2023-03-31	9649
2023-06-30	9144
2023-09-30	8589
2023-12-31	8410