1921 Census of England and Wales, General Report with Appendices, Table 82 : " Relative Fertility in relation to size of existing Family (number of children under 15 years of age)".

Age last
Birthday.		 Number of children under 15 Years of Age in existing Family.
All sizes
(inc. not
stated).		 0
(inc. not
stated).		 1 2 3 4 5 6 7 8 9 10
or more
MARRIED
MEN.		                        
All Ages .098 .076 .103 .101 .121 .151 .179 .199 .210 .232 .238 .303
                         
Under 20 .337 .360 .187 * * — — — — — — —
20—24 .306 .341 .221 .194 .207 .262 .255 * * — * —
25—29 .248 .281 .217 .210 .225 .227 .228 .265 .293 * — —
30—34 .193 .198 .184 .178 .203 .226 .241 .251 .264 .335 * *
35—39 .136 .103 .120 .119 .154 .193 .223 .235 .247 .257 .276 .388
40—44 .081 .035 .054 .069 .102 .148 .181 .203 .211 .237 .244 .296
45—49 .038 .010 .022 .036 .061 .094 .131 .162 .175 .196 .219 .283
50—54 .015 .004 .011 .020 .035 .061 .096 .131 .154 .196 .188 *
55—59 .006 .002 .007 .014 .031 .059 .092 .123 .153 .209 * *
60—64 .003 .001 .008 .019 .035 .061 .102 .162 .125 .204 * *
65—69 .002 .001 .011 .025 .037 .052 .075 .135 * * * —
70 and up .001 .000 .018 .019 .052 .075 .076 * * * — —
                         
MARRIED
WOMEN.		                        
All Ages .101 .080 .104 .102 .122 .152 .180 .200 .211 .233 .239 .304
                         
Under 20 .359 .386 .164 .086 * * — — — * — —
20—24 .310 .357 .234 .209 .208 .260 .240 .232 * * — —
25—29 .241 .273 .219 .215 .231 .238 .242 .257 .296 .375 * *
30—34 .181 .178 .166 .162 .196 .228 .245 .251 .258 .298 .254 .429
35—39 .123 .074 .094 .102 .139 .187 .222 .241 .248 .263 .273 .343
40—44 .058 .017 .030 .046 .077 .118 .155 .176 .181 .211 .224 .263
45—49 .009 .002 .005 .009 .017 .030 .049 .064 .081 .098 .097 *
50—54 .001 .001 .001 .003 .004 .008 .011 .037 .102 * * —
55—59 .001 .000 .002 .005 .014 .044 .137 .180 * — — —
60—64 .001 .000 .008 .031 * * * * * * — —
65—69 .001 .000 .027 .042 * * — * * — — —
70 and up .001 .000 .090 * * * * * * — — —

* Rates are not shewn where the number of children under 1 year of age is less than 10.