Figures from 1981 onward are ONS midyear estimates ( revised as of 2010 ) .
Figures before 1971 have been reconstructed by the Office for National Statistics based on past censuses in order to fit the 2001 limits .
Figures from 1981 onward are Office for National Statistics midyear estimates ( revised as of 2010 ) .
Figures before 1971 have been reconstructed by the Office for National Statistics based on past censuses in order to fit the 2001 limits .