1911 Census of England and Wales, General Report with Appendices, Table 78: " Families of Various Sizes per 1,000 Families in Six of the Principal Cities of Great Britain".

City. Number of Persons in Family. Non
Private
Families.
1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12 or
more
London 93 178 181 163 128 93 63 41 24 13 7 6 10
Edinburgh 51 158 186 183 147 109 72 43 25 12 6 6 2
Glasgow 40 144 172 171 151 120 84 55 31 17 8 5 2
Liverpool 42 137 168 170 151 118 85 55 32 18 9 7 8
Manchester 32 143 188 188 155 113 76 47 28 14 7 4 5
Birmingham 27 135 188 192 158 117 78 48 27 14 7 5 4