Quarter	Sterling
1997-09-30	11458
1997-12-31	11905
1998-03-31	12036
1998-06-30	12438
1998-09-30	12688
1998-12-31	12603
1999-03-31	12764
1999-06-30	12945
1999-09-30	12867
1999-12-31	13664
2000-03-31	13037
2000-06-30	13219
2000-09-30	12954
2000-12-31	12263
2001-03-31	12733
2001-06-30	12490
2001-09-30	12484
2001-12-31	11989
2002-03-31	12126
2002-06-30	12137
2002-09-30	11991
2002-12-31	12424
2003-03-31	11656
2003-06-30	11119
2003-09-30	10619
2003-12-31	11144
2004-03-31	11960
2004-06-30	11562
2004-09-30	13150
2004-12-31	12329
2005-03-31	12845
2005-06-30	12386
2005-09-30	12616
2005-12-31	12315
2006-03-31	13770
2006-06-30	13335
2006-09-30	13386
2006-12-31	13960
2007-03-31	14574
2007-06-30	14161
2007-09-30	13644
2007-12-31	12932
2008-03-31	13701
2008-06-30	13969
2008-09-30	13878
2008-12-31	12741
2009-03-31	12126
2009-06-30	11600
2009-09-30	11456
2009-12-31	14217
2010-03-31	14271
2010-06-30	14120
2010-09-30	14193
2010-12-31	13637
2011-03-31	13690
2011-06-30	13527
2011-09-30	13347
2011-12-31	12965
2012-03-31	13328
2012-06-30	12723
2012-09-30	13031
2012-12-31	12125
2013-03-31	12746
2013-06-30	14012
2013-09-30	12037
2013-12-31	11726
2014-03-31	12314
2014-06-30	12910
2014-09-30	12974
2014-12-31	13062
2015-03-31	13808
2015-06-30	14577
2015-09-30	15381
2015-12-31	15563
2016-03-31	16954
2016-06-30	18244
2016-09-30	17345
2016-12-31	16973
2017-03-31	18365
2017-06-30	18587
2017-09-30	18263
2017-12-31	17727
2018-03-31	17663
2018-06-30	17642
2018-09-30	17253
2018-12-31	17583
2019-03-31	17661
2019-06-30	14111
2019-09-30	14131
2019-12-31	14048
2020-03-31	13476
2020-06-30	15202
2020-09-30	13793
2020-12-31	14103
2021-03-31	13962
2021-06-30	13268
2021-09-30	12156
2021-12-31	12165
2022-03-31	12512
2022-06-30	12013
2022-09-30	12507
2022-12-31	12812
2023-03-31	12927
2023-06-30	12260
2023-09-30	11660
2023-12-31	11623