Year	1 or less	1 to 1.5	Over 1.5
1911	36,036	21,122	26,085
1931	49,028	20,834	20,011
1951	70,647	20,712	11,230
1961	93,061	18,943	6,902
1971	159,047	22,197	5,984
1981	138,338	10,002	1,527
1991	138,422	4,680	533
2001	133,732	3,277	680
2011	131,354	2,255	320

Date:	Source:
1911	1911 Census of England and Wales, Housing, Table 2 , 'Tenements in the Occupation of Private Families. - Classified by Number of Rooms and by Numbers of Occupants, in each Administrative County and in the Aggregates of Urban Districts (exclusive of County Boroughs) and of Rural Districts; also in Urban Districts (other than County Boroughs) and in Rural Districts, 1911'
1931 - 1951	1931 Census of England and Wales, County Report Part I, Table 11 , 'Private Families and Rooms Occupied'
1961	1961 Census of England and Wales, County Report, Table 19 , 'Population in all Private Households by Density of occupation (persons per room)', for 'LAA, Con, NT'
1971	1971 Census of England and Wales, County Report Part II, Table 24 , 'Persons in permanent buildings by density of occupation (persons per room)', for 'AC, CB, Urban areas with populations of 50,000 or more, Aggregates of MB and UD and aggregates of RD, NT and Con Centres. Urban Areas with populations of less than 50,000 and RD'
1981 - 2001	Census of Population
2011	Office for National Statistics, Neighbourhood Statistics (QS409EW)

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