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Top level:	Please select top levelDEMOGRAPHY(POPULATION, VITAL STATISTICS AND CENSUSES) DEMOGRAPHY(POPULATION, VITAL STATISTICS AND CENSUSES)ECONOMICS ECONOMICSEDUCATION EDUCATIONHEALTH HEALTHHISTORY HISTORYHOUSING AND LAND USE PLANNING HOUSING AND LAND USE PLANNINGINFORMATION AND COMMUNICATION INFORMATION AND COMMUNICATIONLABOUR AND EMPLOYMENT LABOUR AND EMPLOYMENTLAW, CRIME AND LEGAL SYSTEMS LAW, CRIME AND LEGAL SYSTEMSNATURAL ENVIRONMENT NATURAL ENVIRONMENTPOLITICS POLITICSPSYCHOLOGY PSYCHOLOGYSCIENCE AND TECHNOLOGY SCIENCE AND TECHNOLOGYSOCIAL STRATIFICATION AND GROUPINGS SOCIAL STRATIFICATION AND GROUPINGSSOCIAL WELFARE POLICY AND SYSTEMS SOCIAL WELFARE POLICY AND SYSTEMSSOCIETY AND CULTURE SOCIETY AND CULTURETRADE, INDUSTRY AND MARKETS (including branches of the economy) TRADE, INDUSTRY AND MARKETS (including branches of the economy)TRANSPORT, TRAVEL (AND MOBILITY) TRANSPORT, TRAVEL (AND MOBILITY)	INTRODUCTION   About the classification All DDA data materials have been classified - i.e. linked to one or more topics and sub topics. The topics are the result of the co-operation between the European data archives. Each top level has a list of sub levels for more precise queries.
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