1921 Census of England and Wales, General Report with Appendices, Table 83 : " Relative Fertility by Geographical Regions".

Area.* Relative Fertility—Age of Adult being Ratio
of Fert-
ility
Rate
(All Ages)
to that
of Eng-
land
& Wales.
Ratio of
Actual
Children
to Stan-
dard
Number
obtained
by Appl-
ication
of E. & W.
Age Rates
to Local
Popu-
lation.
All
Ages
Under
20
20—
24
25—
29
30—
34
35—
39
40—
44
45—
49
50—
54
Over
55
                        % %
Married Men.                      
  England and
  Wales
0.098 0.337 0.306 0.248 0.193 0.136 0.081 0.038 0.015 0.004 100 100
                           
  Wales
  (including
  Monmouth)
0.112 0.310 0.322 0.262 0.209 0.154 0.098 0.048 0.019 0.005 114 111
  Central
  Counties
0.101 0.355 0.309 0.252 0.196 0.140 0.084 0.038 0.015 0.004 103 102
  Northern
  Counties
0.102 0.329 0.314 0.250 0.192 0.135 0.081 0.038 0.014 0.004 104 100
  London and
  Surrounding
  Counties
0.093 0.342 0.292 0.240 0.189 0.133 0.078 0.037 0.015 0.004 95 97
  Southern
  Counties
0.083 0.331 0.282 0.239 0.187 0.129 0.074 0.036 0.014 0.003 85 95
  Eastern
  Counties
0.091 0.341 0.309 0.256 0.198 0.139 0.083 0.040 0.015 0.003 93 102
                           
Married Women                      
(enumerated with their husbands)                   % %
  England and
  Wales
0.101 0.359 0.310 0.241 0.181 0.123 0.058 0.009 0.001 0.001 100 100
                           
  Wales
  (including
  Monmouth)
0.116 0.373 0.328 0.252 0.192 0.137 0.067 0.012 0.002 0.001 115 108
  Central
  Counties
0.104 0.365 0.314 0.245 0.186 0.129 0.062 0.010 0.001 0.001 103 103
  Northern
  Counties
0.105 0.359 0.317 0.242 0.181 0.124 0.057 0.009 0.002 0.001 104 101
  London and
  Surrounding
  Counties
0.097 0.351 0.293 0.235 0.176 0.117 0.054 0.009 0.001 0.001 96 96
  Southern
  Counties
0.084 0.329 0.290 0.233 0.172 0.116 0.054 0.008 0.001 0.001 83 95
  Eastern
  Counties
0.094 0.384 0.320 0.249 0.185 0.126 0.060 0.010 0.001 0.001 93 103

* For constitution of areas, see p. 19.