With the exception of 2001, these data have been created for
Vision of Britain by re-districting statistics originally
reported for other units. We have also had to deal with
variations in the categories and classifications used in
statistical reporting over the years. - 1841: The data come from
the Occupational Abstract of the 1841 census, which the project
has computerised in full. The calculation of numbers in each of
the six sectors used here was based on the occupations listed in
the census report data having already been assigned to the
occupation units used by the 1921 census occupational tables,
using the 'Alphabetical List' (pp. 91-191) in Census 1921.
Classification of Occupations (London: HMSO, 1924). We then
assigned these occupation orders to social classes by following
table A, 'Occupational Mortality, Legitimate Fertility and
Infant Mortality', pp. ciii-cxiv in the Registrar General's
Decennial Supplement for 1921, Part II. Occupational Mortality,
Fertility and Infant Mortality (London: HMSO, 1