This machine-readable version of John Williams' <i>Digest of Welsh Historical Statistics</i> is the result of a collaboration between the Statistical Directorate of the National Assembly for Wales, the History Data Service and the Centre for Data Digitisation and Analysis at Queen's University Belfast. John Williams' <i>Digest of Welsh Historical Statistics</i> is intended to provide a service for those working on the history of modern Wales. It arises from a belief that the quantitative element is a necessary and important part of the historical record; from an awareness that it was an aspect that was particularly inaccessible for scholars of Welsh history; and from a conviction that some encouragement in the use of quantitative material was necessary. It is modelled on the two volumes dedicated to British historical statistics: Mitchell, B.R. and Deane, P. (1962) <i>Abstract of British historical statistics</i> and Mitchell, B.R. and Jones, H.G. (1971) <i>Second abstract of British historical statistics</i>. Tourism. Percentage of British holiday-makers staying in each country for one night or more on holidays in Great Britain Election results. All parliamentary elections and by-elections, 1832-1974 Health Service. Number of doctors and persons supplying drugs, for insured persons, 1918-1974 Health Service. Number of medical and dental practitioners, and number of hospital staff, 1949-1974 Health Service. Hospitals. Number of beds, available and occupied, 1931-1938, 1948-1975; and number of out-patients, 1948-1975 Health Service. Gross expenditure, by category, 1950-1975 Health Service. Local authority services, number of users etc., 1931-1975 Social Services. Non-contributory pensions, number payable, 1909-1965; National assistance, number of cases, 1936-1965; Supplementary benefits, number in payment, 1966-1974 Social Services. Contributory pensions, benefits and allowances, 1926-1975 Social Services. National health insurance, receipts, etc., 1912-1944; claims and insured persons absent from work, 1949-1975 Social Services. Family allowances. Number of families receiving and number of children for whom allowances were paid, 1948-1975 Crime. Indictable offences known to police, 1857-1974; persons prosecuted for non-indictable offences, 1893-1974 Crime. Assizes and Quarter Sessions. Number of persons brought for trial, 1805-1974; offences classified, 1834-1918; number convicted, 1834-1874 Crime. Courts of summary jurisdiction. Number brought for trial, 1857-1918; number a) tried and b) found guilty of indictable offences 1893-1918, 1949-1974 Public utilities. Tramways, 1880-1938 Public utilities. Gas, 1882-1939 Please note: this study does not include information on named individuals and would therefore not be useful for personal family history research.