Quarter	Sterling
1997-09-30	13665
1997-12-31	13409
1998-03-31	13963
1998-06-30	13993
1998-09-30	14819
1998-12-31	15480
1999-03-31	15594
1999-06-30	16020
1999-09-30	17838
1999-12-31	17777
2000-03-31	18600
2000-06-30	18419
2000-09-30	17901
2000-12-31	17566
2001-03-31	17533
2001-06-30	17712
2001-09-30	18062
2001-12-31	18505
2002-03-31	17534
2002-06-30	17044
2002-09-30	16102
2002-12-31	15201
2003-03-31	14020
2003-06-30	14201
2003-09-30	13762
2003-12-31	13079
2004-03-31	13928
2004-06-30	13302
2004-09-30	12667
2004-12-31	12882
2005-03-31	12431
2005-06-30	13708
2005-09-30	12020
2005-12-31	12912
2006-03-31	12128
2006-06-30	12090
2006-09-30	11938
2006-12-31	12381
2007-03-31	12424
2007-06-30	13869
2007-09-30	12309
2007-12-31	13182
2008-03-31	14975
2008-06-30	15749
2008-09-30	16665
2008-12-31	17027
2009-03-31	17867
2009-06-30	16550
2009-09-30	15534
2009-12-31	14668
2010-03-31	14912
2010-06-30	15199
2010-09-30	14251
2010-12-31	15594
2011-03-31	15975
2011-06-30	14926
2011-09-30	14358
2011-12-31	14134
2012-03-31	13937
2012-06-30	13869
2012-09-30	14821
2012-12-31	14868
2013-03-31	14852
2013-06-30	13875
2013-09-30	14007
2013-12-31	13780
2014-03-31	13958
2014-06-30	14489
2014-09-30	15498
2014-12-31	15263
2015-03-31	15601
2015-06-30	16685
2015-09-30	17641
2015-12-31	18321
2016-03-31	18330
2016-06-30	17826
2016-09-30	18176
2016-12-31	18442
2017-03-31	18818
2017-06-30	19097
2017-09-30	18736
2017-12-31	18875
2018-03-31	20294
2018-06-30	21579
2018-09-30	20780
2018-12-31	21596
2019-03-31	21608
2019-06-30	22320
2019-09-30	21887
2019-12-31	21174
2020-03-31	23397
2020-06-30	24848
2020-09-30	24552
2020-12-31	22553
2021-03-31	21898
2021-06-30	22561
2021-09-30	22390
2021-12-31	21849
2022-03-31	22712
2022-06-30	22604
2022-09-30	22688
2022-12-31	21707
2023-03-31	22790
2023-06-30	21329
2023-09-30	21826
2023-12-31	20764