Quarter	Sterling
1997-12-31	6592
1998-03-31	6253
1998-06-30	6681
1998-09-30	5504
1998-12-31	6789
1999-03-31	6213
1999-06-30	6305
1999-09-30	5809
1999-12-31	6123
2000-03-31	5352
2000-06-30	6721
2000-09-30	5394
2000-12-31	6383
2001-03-31	5606
2001-06-30	6091
2001-09-30	5402
2001-12-31	6855
2002-03-31	5586
2002-06-30	6242
2002-09-30	5648
2002-12-31	6228
2003-03-31	5515
2003-06-30	5660
2003-09-30	5362
2003-12-31	6245
2004-03-31	6024
2004-06-30	6270
2004-09-30	5948
2004-12-31	7801
2005-03-31	7737
2005-06-30	7091
2005-09-30	6839
2005-12-31	9754
2006-03-31	7029
2006-06-30	7905
2006-09-30	6836
2006-12-31	9280
2007-03-31	7662
2007-06-30	8991
2007-09-30	7305
2007-12-31	10427
2008-03-31	8252
2008-06-30	8041
2008-09-30	7461
2008-12-31	9349
2009-03-31	8135
2009-06-30	10084
2009-09-30	9575
2009-12-31	11735
2010-03-31	11052
2010-06-30	10796
2010-09-30	11323
2010-12-31	11636
2011-03-31	9187
2011-06-30	9895
2011-09-30	7780
2011-12-31	8749
2012-03-31	7436
2012-06-30	9711
2012-09-30	9012
2012-12-31	11214
2013-03-31	10201
2013-06-30	10954
2013-09-30	9620
2013-12-31	11867
2014-03-31	11978
2014-06-30	11301
2014-09-30	10159
2014-12-31	12189
2015-03-31	10920
2015-06-30	12276
2015-09-30	11633
2015-12-31	14795
2016-03-31	14004
2016-06-30	14140
2016-09-30	13455
2016-12-31	15545
2017-03-31	15210
2017-06-30	16123
2017-09-30	15554
2017-12-31	17011
2018-03-31	16225
2018-06-30	17369
2018-09-30	15749
2018-12-31	18064
2019-03-31	16354
2019-06-30	17002
2019-09-30	15997
2019-12-31	17762
2020-03-31	19099
2020-06-30	20830
2020-09-30	20196
2020-12-31	21458
2021-03-31	19840
2021-06-30	20564
2021-09-30	19381
2021-12-31	20335
2022-03-31	17808
2022-06-30	19876
2022-09-30	19203
2022-12-31	18669
2023-03-31	17310
2023-06-30	17952
2023-09-30	18328
2023-12-31	19771