Quarter	Sterling
1997-09-30	74420
1997-12-31	71920
1998-03-31	73374
1998-06-30	73857
1998-09-30	75404
1998-12-31	77526
1999-03-31	80113
1999-06-30	83260
1999-09-30	83788
1999-12-31	87636
2000-03-31	93916
2000-06-30	97030
2000-09-30	100547
2000-12-31	108913
2001-03-31	115022
2001-06-30	120445
2001-09-30	126435
2001-12-31	131233
2002-03-31	135226
2002-06-30	141125
2002-09-30	144942
2002-12-31	151747
2003-03-31	159023
2003-06-30	164555
2003-09-30	168697
2003-12-31	170782
2004-03-31	176894
2004-06-30	185561
2004-09-30	189850
2004-12-31	196919
2005-03-31	206061
2005-06-30	216061
2005-09-30	223937
2005-12-31	231335
2006-03-31	241433
2006-06-30	251099
2006-09-30	259814
2006-12-31	272051
2007-03-31	282978
2007-06-30	292152
2007-09-30	311359
2007-12-31	317599
2008-03-31	360924
2008-06-30	369162
2008-09-30	376389
2008-12-31	373089
2009-03-31	371198
2009-06-30	367658
2009-09-30	365400
2009-12-31	359495
2010-03-31	360047
2010-06-30	352614
2010-09-30	347005
2010-12-31	327901
2011-03-31	279688
2011-06-30	278861
2011-09-30	273875
2011-12-31	265200
2012-03-31	260322
2012-06-30	254252
2012-09-30	251359
2012-12-31	247301
2013-03-31	245436
2013-06-30	242425
2013-09-30	236136
2013-12-31	226249
2014-03-31	222239
2014-06-30	222694
2014-09-30	219824
2014-12-31	215954
2015-03-31	226152
2015-06-30	227604
2015-09-30	230012
2015-12-31	232223
2016-03-31	236547
2016-06-30	240083
2016-09-30	242597
2016-12-31	246497
2017-03-31	243670
2017-06-30	245931
2017-09-30	247918
2017-12-31	245624
2018-03-31	249136
2018-06-30	254982
2018-09-30	256341
2018-12-31	261532
2019-03-31	264478
2019-06-30	266682
2019-09-30	267705
2019-12-31	265181
2020-03-31	270428
2020-06-30	279961
2020-09-30	283154
2020-12-31	282931
2021-03-31	285226
2021-06-30	283775
2021-09-30	280866
2021-12-31	284851
2022-03-31	287600
2022-06-30	291568
2022-09-30	292110
2022-12-31	292620
2023-03-31	290170
2023-06-30	290982
2023-09-30	293361
2023-12-31	294713