1921 Census of England and Wales, General Report with Appendices, Table 75 : " Dependency by Occupation, Married Men. Average number of Children under 16 years of age in Family".

Occupational Group. Average
age of
Married
Men.		 Average
No. of
Children.		 Occupational Group. Average
age of
Married
Men.		 Average
No. of
Children.
  All married men 44.8 1.27 XVI.— Paper workers, print-
  ers, etc.		 44.1 1.13
  All occupied (Orders
  I— XXXI)		 43.8 1.32 XVII.— Builders, Bricklayers,
  etc.		 46.0 1.44
  Unoccupied and Re-
  tired (Order XXXII)		 62.5 0.39 XVIII.— Painters and Decor
  ators		 44.8 1.37
I.— Fishermen 43.8 1.56 XIX.— Workers in other de
   fined materials		 42.8 1.31
II.— Agricultural Occu-
  pations		 48.0 1.25 XX.— Workers in mixed and
  undefined materials		 43.2 1.36
III.— Mining and Quarrying 40.9 1.82 XXI.— Gas, water, electricity
  supply, workers		 44.9 1.52
IV.— Workers—Non-metal-
  liferous mine and
  quarry products		 42.7 1.69 XXII.— Transport workers 42.2 1.42
V.— Makers of Bricks,
  Pottery and Glass		 42.9 1.54 XXIII.— Commercial and Fin-
  ancial occupations		 45.0 1.10
VI.— Workers in Chemical
  processes		 43.2 1.51 XXIV.— Public Administration
  and Defence		 38.9 1.15
VII.— Metal workers 41.8 1.41 XXV.—- Professional occupa
  tions		 46.5 0.90
VIII.— Worker in Precious
  Metals, etc.		 43.7 1.23 XXVI.— Persons employed in
  Entertainment, Sport,
  etc.		 42.9 1.07
IX.— Electrical apparatus
  makers, fitters, etc.		 38.6 1.36 XXVII.— Persons employed in
  Personal Service		 46.5 1.05
X.— Makers of Watches,
  Clocks, etc.		 45.2 1.04 XXVIII.— Clerks, Draughtsmen,
  Typists, etc.		 41.8 0.94
XI.— Workers in Skins,
  Leather goods mkrs.		 45.5 1.23 XXIX.— Warehousemen, Pack
  ers, etc.		 43.8 1.17
XlI.— Textile workers 44.1 1.01 XXX.— Stationary Engine
  Drivers, etc.		 43.1 1.59
XIII.— Makers of Textile
  goods and articles
  of dress		 45.5 1.24 XXXI.— All other occupations 45.2 1.44
XIV.— Makers of Foods,
  Drinks and Tobacco		 44.0 1.30 XXXII.— Unoccupied, including
  retired		 62.5 0.39
XV.— Workers in Wood and
  Furniture		 45.2 1.23