Within each district, figures they are broken down by hard to count group. There are three hard to count levels - 1 being the easiest and 3 being the hardest to count. In England and Wales the index was constructed from the following 1991 Census variables:
mulit-occupancy - defined as addresses containing more than one household
unemployment
language difficulty - derived from country of birth
private rented accommodation
number of households imputed in 1991
In some districts a very small sample size in one hard to count group led to it being merged with an adjacent group. There is more information on the CCS sample design HERE.
The number of CCS clusters (the clusters were part of the sample design) in each district and hard to count group is also given.
The information relates to all persons used to derive the One Number Census estimates. Persons in an interviewed household subsequently deemed to be outside the scope of the survey (for example, a household was found not to be in a sample area, or was a communal establishment) are excluded from these figures. In addition, postcodes that were part of the original sample were occasionally excluded from the estimation process, for example, where recruitment problems prevented interviews from being carried out. Such postcodes were not included in the numbers of CCS postcodes listed here.
The numbers of persons in the "Total" columns are the final One Number Census estimates of the population for each district. The "% in CCS" column is the best estimate of the CCS sampling fractions. The total number of postcodes given is the number of residential postcodes in the district, taken from 2001 Census information.
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