Quarter	Sterling
1997-09-30	20627
1997-12-31	20728
1998-03-31	22124
1998-06-30	22189
1998-09-30	23240
1998-12-31	23259
1999-03-31	22498
1999-06-30	23062
1999-09-30	23934
1999-12-31	23594
2000-03-31	23387
2000-06-30	23546
2000-09-30	23572
2000-12-31	24188
2001-03-31	22933
2001-06-30	23515
2001-09-30	23681
2001-12-31	23361
2002-03-31	23192
2002-06-30	23811
2002-09-30	24216
2002-12-31	26939
2003-03-31	24935
2003-06-30	25983
2003-09-30	26492
2003-12-31	27269
2004-03-31	28055
2004-06-30	26623
2004-09-30	27465
2004-12-31	27048
2005-03-31	27629
2005-06-30	30041
2005-09-30	31746
2005-12-31	31624
2006-03-31	31551
2006-06-30	33601
2006-09-30	33359
2006-12-31	32217
2007-03-31	32029
2007-06-30	37360
2007-09-30	38739
2007-12-31	37202
2008-03-31	38508
2008-06-30	38434
2008-09-30	40594
2008-12-31	38730
2009-03-31	37181
2009-06-30	34869
2009-09-30	34452
2009-12-31	33900
2010-03-31	33445
2010-06-30	33135
2010-09-30	32518
2010-12-31	32543
2011-03-31	33295
2011-06-30	31349
2011-09-30	31178
2011-12-31	30975
2012-03-31	30611
2012-06-30	29776
2012-09-30	30232
2012-12-31	29124
2013-03-31	29145
2013-06-30	28956
2013-09-30	28137
2013-12-31	28961
2014-03-31	29656
2014-06-30	30424
2014-09-30	32689
2014-12-31	34258
2015-03-31	34132
2015-06-30	32203
2015-09-30	32658
2015-12-31	33151
2016-03-31	34151
2016-06-30	34713
2016-09-30	34594
2016-12-31	35555
2017-03-31	35260
2017-06-30	35553
2017-09-30	36978
2017-12-31	38167
2018-03-31	38713
2018-06-30	39951
2018-09-30	39637
2018-12-31	40432
2019-03-31	40465
2019-06-30	38402
2019-09-30	38783
2019-12-31	39095
2020-03-31	39668
2020-06-30	42357
2020-09-30	42742
2020-12-31	42326
2021-03-31	44394
2021-06-30	43403
2021-09-30	48419
2021-12-31	44753
2022-03-31	44364
2022-06-30	41860
2022-09-30	40346
2022-12-31	40831
2023-03-31	39971
2023-06-30	38946
2023-09-30	38888
2023-12-31	37076