Quarter	Sterling
1997-12-31	2321
1998-03-31	2545
1998-06-30	2533
1998-09-30	2541
1998-12-31	2322
1999-03-31	2369
1999-06-30	2844
1999-09-30	2699
1999-12-31	2406
2000-03-31	2505
2000-06-30	2695
2000-09-30	2784
2000-12-31	2694
2001-03-31	2748
2001-06-30	2869
2001-09-30	2980
2001-12-31	2819
2002-03-31	3300
2002-06-30	3018
2002-09-30	3124
2002-12-31	2945
2003-03-31	3128
2003-06-30	3333
2003-09-30	3221
2003-12-31	2917
2004-03-31	3115
2004-06-30	3279
2004-09-30	3255
2004-12-31	3322
2005-03-31	3240
2005-06-30	3222
2005-09-30	3401
2005-12-31	3295
2006-03-31	3412
2006-06-30	3764
2006-09-30	3548
2006-12-31	3531
2007-03-31	3687
2007-06-30	3796
2007-09-30	3933
2007-12-31	4008
2008-03-31	3863
2008-06-30	4136
2008-09-30	4214
2008-12-31	4063
2009-03-31	4213
2009-06-30	4393
2009-09-30	4433
2009-12-31	4192
2010-03-31	4895
2010-06-30	4921
2010-09-30	4797
2010-12-31	5509
2011-03-31	5444
2011-06-30	5529
2011-09-30	5354
2011-12-31	5393
2012-03-31	5752
2012-06-30	5090
2012-09-30	4927
2012-12-31	4770
2013-03-31	4174
2013-06-30	4351
2013-09-30	4541
2013-12-31	4445
2014-03-31	4837
2014-06-30	5227
2014-09-30	5395
2014-12-31	5078
2015-03-31	5431
2015-06-30	5387
2015-09-30	5724
2015-12-31	5325
2016-03-31	5845
2016-06-30	6748
2016-09-30	6346
2016-12-31	6479
2017-03-31	7104
2017-06-30	7017
2017-09-30	6962
2017-12-31	6573
2018-03-31	6994
2018-06-30	7383
2018-09-30	7458
2018-12-31	7182
2019-03-31	7417
2019-06-30	7465
2019-09-30	7768
2019-12-31	7074
2020-03-31	8137
2020-06-30	11367
2020-09-30	11915
2020-12-31	11458
2021-03-31	11397
2021-06-30	12345
2021-09-30	12529
2021-12-31	11336
2022-03-31	12177
2022-06-30	11999
2022-09-30	11890
2022-12-31	10994
2023-03-31	11911
2023-06-30	11146
2023-09-30	11282
2023-12-31	11228