1921 Census of England and Wales, General Report with Appendices, Table 21 : " Population and Proportion per cent. of Population living under various conditions of Room Accommodation, 1921 and 1911. England and Wales".

Average number of
occupants per room.		 1921. 1911.
Population in Private
Families.		 Population in Private
Families.
Number. Proportion
per cent.		 Number. Proportion
per cent.
½ or less 3,654,375 10.1 3,349,229 9.7
Over ½ but less than 1 8,094,314 22.4 7,629,070 22.0
1 5,817,374 16.1 5,183,449 15.0
Over 1 but not over 1½ 8,295,021 22.9 8,026,230 23.2
  "   1½   "    "     "   2 5,615,693 15.5 5,501,453 15.9
  "   2   "    "     "   2½ 1,734,633 4.8 1,668,580 4.8
  "   2½   "    "     "   3 1,102,521 3.0 955,167 2.8
  "  3 but less than 4 316,476 0.9 262,374 0.8
4 and over 320,659 0.9 253,351 0.7
         
Population in tenements of over 9 rooms 1,228,880 3.4 1,777,270 5.1
         
Total 36,179,946 100.0 34,606,173 100.0