1 Information for this section was provided by the Centre for the History of Medicine at the University of Glasgow, where a team funded by the Wellcome Trust is researching the history of civil registration in Scotland.
2 Migration figures do not include the years 1940 to 1947. Figures were distorted by military conscription.
3 More information on the Standard Occupational Classification 2000 can be found at http://www.statistics.gov.uk/